---
title: Why are reusable rocket boosters a big deal? — The history of space exploration · tree and pragmatics
description: Why are reusable rocket boosters a big deal? Test 11 of lesson 29 «The history of space exploration» of the space course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 11 · The history of space exploration

<!-- .ven lang=en -->
Why are reusable rocket boosters a big deal?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **What happens:** be · **To what, where:** reusable rocket boosters

<!-- .vabout -->
This is test 11 of lesson 29 «The history of space exploration» of the space 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/space/29-the-history-of-space-exploration/#t11).

## The question {#question}

```conllu
# sent_id = question:space:29-the-history-of-space-exploration:t11:1
# text = Why are reusable rocket boosters a big deal?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	reusable	reusable	ADJ	JJ	Degree=Pos	5	amod	_	_
4	rocket	rocket	NOUN	NN	Number=Sing	5	compound	_	_
5	boosters	booster	NOUN	NNS	Number=Plur	0	root	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	big	big	ADJ	JJ	Degree=Pos	8	amod	_	_
8	deal	deal	NOUN	NN	Number=Sing	5	appos	_	SpaceAfter=No
9	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | reusable rocket boosters |  |  |  |  | tree rules |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
They make rockets fast enough to fly to other stars

```conllu
# sent_id = question:space:29-the-history-of-space-exploration:t11:o1:1
# text = They make rockets fast enough to fly to other stars
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	rockets	rocket	NOUN	NNS	Number=Plur	2	obj	_	_
4	fast	fast	ADV	RB	Degree=Pos	2	advmod	_	_
5	enough	enough	ADV	RB	_	4	advmod	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	fly	fly	VERB	VB	VerbForm=Inf	2	advcl	_	_
8	to	to	ADP	IN	_	10	case	_	_
9	other	other	ADJ	JJ	Degree=Pos	10	amod	_	_
10	stars	star	NOUN	NNS	Number=Plur	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | They | rockets |  |  |  | fast *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset rocket=Product |
| 2 | **fly** | to-infinitive | They *not said here* |  |  |  |  | to other stars *result* | vn run-51.3.2-2-1 «NP V PP.result»: agent=Theme to star=Result |

### Option 2 {#o2}

<!-- .ven lang=en -->
They make the astronauts lighter so they can float

```conllu
# sent_id = question:space:29-the-history-of-space-exploration:t11:o2:1
# text = They make the astronauts lighter so they can float
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	astronauts	astronaut	NOUN	NNS	Number=Plur	5	nsubj	_	_
5	lighter	lighter	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	xcomp	_	_
6	so	so	SCONJ	IN	_	9	mark	_	_
7	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	9	nsubj	_	_
8	can	can	AUX	MD	VerbForm=Fin	9	aux	_	_
9	float	float	VERB	VB	VerbForm=Inf	2	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | They |  |  |  |  |  | tree rules |
| 2 | **lighter** | present | the astronauts |  |  |  |  |  | tree rules |
| 3 | **float** | can | astronauts *= astronaut* |  |  |  |  |  | vn run-51.3.2-2 «NP V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
They let rockets fly up without needing any fuel at all

```conllu
# sent_id = question:space:29-the-history-of-space-exploration:t11:o3:1
# text = They let rockets fly up without needing any fuel at all
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	let	let	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
3	rockets	rocket	NOUN	NNS	Number=Plur	2	obj	_	_
4	fly	fly	VERB	VB	VerbForm=Inf	2	xcomp	_	_
5	up	up	ADP	RP	_	4	compound:prt	_	_
6	without	without	SCONJ	IN	_	7	mark	_	_
7	needing	need	VERB	VBG	VerbForm=Ger	4	advcl	_	_
8	any	any	DET	DT	PronType=Ind	9	det	_	_
9	fuel	fuel	NOUN	NN	Number=Sing	7	obj	_	_
10	at	at	ADP	IN	_	11	case	_	_
11	all	all	DET	DT	PronType=Tot	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **let** | past | They | rockets |  |  |  |  | tree rules |
| 2 | **fly up** | infinitive | rockets *not said here* |  |  |  |  |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |
| 3 | **need** | gerund | rockets *not said here* | any fuel |  | all |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot fuel=Theme |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Landing and reusing them saves building new ones

```conllu
# sent_id = question:space:29-the-history-of-space-exploration:t11:o4:1
# text = Landing and reusing them saves building new ones
1	Landing	land	VERB	VBG	VerbForm=Ger	5	csubj	_	_
2	and	and	CCONJ	CC	_	3	cc	_	_
3	reusing	reuse	VERB	VBG	VerbForm=Ger	1	conj	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	saves	save	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	building	build	VERB	VBG	VerbForm=Ger	5	xcomp	_	_
7	new	new	ADJ	JJ	Degree=Pos	8	amod	_	_
8	ones	one	NOUN	NNS	Number=Plur	6	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **land** | gerund |  |  |  |  |  |  | vn pocket-9.10-1 «NP V»: agent=Theme |
| 2 | **reuse** | gerund |  | them *= they* |  |  |  |  | vn consume-66-1 «NP V NP»: agent=Agent they=Asset |
| 3 | **save** | present | Landing |  |  |  |  |  | tree rules |
| 4 | **build** | gerund | Landing *not said here* | new ones |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset one=Product |

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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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