---
title: The final whistle blows and millions of people switch on kettles at… — Power stations and the grid · tree and pragmatics
description: The final whistle blows and millions of people switch on kettles at once. What does the grid control room do? Test 4 · ★ of lesson 32 «Power stations and the grid» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's ch
---

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# Test 4 · ★ · Power stations and the grid

<!-- .ven lang=en -->
The final whistle blows and millions of people switch on kettles at once. What does the grid control room do?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** final whistle blows, control room · **What happens:** switch, do · **To what, where:** kettles

<!-- .vabout -->
This is test 4 · ★ of lesson 32 «Power stations and the grid» of the technology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/technology/32-power-stations-and-the-grid/#t4).

## The question {#question}

<!-- .note -->
*Sentence 1:* The final whistle blows and millions of people switch on kettles at once.

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:1
# text = The final whistle blows and millions of people switch on kettles at once.
1	The	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
2	final	final	ADJ	JJ	Degree=Pos	4	amod	_	_
3	whistle	whistle	NOUN	NN	Number=Sing	4	compound	_	_
4	blows	blow	NOUN	NNS	Number=Plur	9	nsubj	_	_
5	and	and	CCONJ	CC	_	6	cc	_	_
6	millions	million	NOUN	NNS	Number=Plur	4	conj	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	people	people	NOUN	NNS	Number=Plur	6	nmod	_	_
9	switch	switch	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
10	on	on	ADP	IN	_	11	case	_	_
11	kettles	kettle	NOUN	NNS	Number=Plur	9	obl	_	_
12	at	at	ADP	IN	_	13	case	_	_
13	once	once	ADV	RB	NumForm=Word|NumType=Mult	9	obl	_	SpaceAfter=No
14	.	.	PUNCT	.	_	9	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **switch** | present | the final whistle blows and millions of people |  |  | kettles |  |  | vn convert-26.6.2-1-1 «NP V»: agent=Patient |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- .note -->
*Sentence 2:* What does the grid control room do?

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:2
# text = What does the grid control room do?
1	What	what	PRON	WP	PronType=Int	7	obj	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
4	grid	grid	NOUN	NN	Number=Sing	5	compound	_	_
5	control	control	NOUN	NN	Number=Sing	6	compound	_	_
6	room	room	NOUN	NN	Number=Sing	7	nsubj	_	_
7	do	do	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
8	?	?	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present · do-support | the control room |  |  |  |  |  | vn act-114-1 «NP V NP»: agent=Agent what=Eventuality |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Asks everyone on the TV to switch their kettles off again

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:o1:1
# text = Asks everyone on the TV to switch their kettles off again
1	Asks	ask	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
2	everyone	everyone	PRON	NN	Number=Sing|PronType=Tot	1	obj	_	_
3	on	on	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	TV	TV	NOUN	NN	Number=Sing	1	obl	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	switch	switch	VERB	VB	VerbForm=Inf	1	xcomp	_	_
8	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	kettles	kettle	NOUN	NNS	Number=Plur	7	obj	_	_
10	off	off	ADV	RB	_	7	advmod	_	_
11	again	again	ADV	RB	_	7	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ask** *speech: ask* | present |  | everyone |  | the TV |  |  | vn inquire-37.1.2 «NP V NP whether S\_INF»: agent=Agent everyone=Recipient clause=Topic |
| 2 | **switch off** *not said to happen* | to-infinitive | everyone *not said here* | their kettles |  |  | again | off *property* | vn convert-26.6.2-1-1 «NP V NP»: agent=Agent kettle=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Nothing, kettles use no electricity

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:o2:1
# text = Nothing, kettles use no electricity
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	3	compound	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	kettles	kettle	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	no	no	DET	DT	PronType=Neg	6	det	_	_
6	electricity	electricity	NOUN	NN	Number=Sing	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present | Nothing kettles | no electricity |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent electricity=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
Switches off half the country

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:o3:1
# text = Switches off half the country
1	Switches	switch	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
2	off	off	ADP	RP	_	1	compound:prt	_	_
3	half	half	DET	PDT	NumForm=Word|NumType=Frac|PronType=Ind	5	det:predet	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	country	country	NOUN	NN	Number=Sing	1	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **switch off** | present |  | half country |  |  |  |  | vn convert-26.6.2-1-1 «NP V NP»: agent=Agent country=Patient |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Adds power quickly from fast-starting stations

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:t4:o4:1
# text = Adds power quickly from fast-starting stations
1	Adds	add	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
2	power	power	NOUN	NN	Number=Sing	1	obj	_	_
3	quickly	quickly	ADV	RB	_	1	advmod	_	_
4	from	from	ADP	IN	_	8	case	_	_
5	fast	fast	ADJ	JJ	Degree=Pos	7	amod	_	SpaceAfter=No
6	-	-	PUNCT	HYPH	_	5	punct	_	SpaceAfter=No
7	starting	starting	NOUN	NN	Number=Sing	8	compound	_	_
8	stations	station	NOUN	NNS	Number=Plur	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **add** *speech: assert* | present |  | power |  | starting stations |  | quickly *property* | vn mix-22.1-2 «NP V NP»: agent=Agent power=Patient |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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- ← previous: [Power stations and the grid, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t3/)
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