---
title: On a desert island with no toothbrush, what would help clean your te… — Teeth: enamel, sugar, holes, brushing… · tree and pragmatics
description: On a desert island with no toothbrush, what would help clean your teeth best? Test 11 · ★ of lesson 352 «Teeth: enamel, sugar, holes, brushing and the dentist» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice wa
---

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# Test 11 · ★ · Teeth: enamel, sugar, holes, brushing and the dentist

<!-- .ven lang=en -->
On a desert island with no toothbrush, what would help clean your teeth best?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 4 · wrong ✗ · **What happens:** help, clean · **To what, where:** desert island, teeth

<!-- .vabout -->
This is test 11 · ★ of lesson 352 «Teeth: enamel, sugar, holes, brushing and the dentist» of the biology 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/biology/352-teeth-enamel-sugar-holes-brushing-and-the-dentist/#t11).

## The question {#question}

```conllu
# sent_id = question:biology:352-teeth-enamel-sugar-holes-brushing-and-the-dentist:t11:1
# text = On a desert island with no toothbrush, what would help clean your teeth best?
1	On	on	ADP	IN	_	4	case	_	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
3	desert	desert	NOUN	NN	Number=Sing	4	compound	_	_
4	island	island	NOUN	NN	Number=Sing	11	obl	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	no	no	DET	DT	PronType=Neg	7	det	_	_
7	toothbrush	toothbrush	NOUN	NN	Number=Sing	4	nmod	_	SpaceAfter=No
8	,	,	PUNCT	,	_	11	punct	_	_
9	what	what	PRON	WP	PronType=Int	11	nsubj	_	_
10	would	would	AUX	MD	VerbForm=Fin	11	aux	_	_
11	help	help	VERB	VB	VerbForm=Inf	0	root	_	_
12	clean	clean	VERB	VB	VerbForm=Inf	11	xcomp	_	_
13	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	teeth	tooth	NOUN	NNS	Number=Plur	12	obj	_	_
15	best	good	ADJ	JJS	Degree=Sup	12	xcomp	_	SpaceAfter=No
16	?	?	PUNCT	.	_	11	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | would |  |  |  | a desert island with no toothbrush |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent clause=Theme |
| 2 | **clean** | infinitive |  | your teeth |  |  |  | good *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent tooth=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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Drinking seawater

```conllu
# sent_id = question:biology:352-teeth-enamel-sugar-holes-brushing-and-the-dentist:t11:o1:1
# text = Drinking seawater
1	Drinking	drink	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
2	seawater	seawater	NOUN	NN	Number=Sing	1	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drink** | gerund |  | seawater |  |  |  |  | vn eat-39.1-1 «NP V NP»: agent=Agent seawater=Patient |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Rubbing them hard with handfuls of wet sand

```conllu
# sent_id = question:biology:352-teeth-enamel-sugar-holes-brushing-and-the-dentist:t11:o2:1
# text = Rubbing them hard with handfuls of wet sand
1	Rubbing	rub	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
2	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	1	obj	_	_
3	hard	hard	ADJ	JJ	Degree=Pos	1	xcomp	_	_
4	with	with	ADP	IN	_	5	case	_	_
5	handfuls	handful	NOUN	NNS	Number=Plur	1	obl	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	wet	wet	ADJ	JJ	Degree=Pos	8	amod	_	_
8	sand	sand	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rub** | gerund |  | them *= they* |  |  |  | with handfuls of wet sand; hard *property* | vn spray-9.7-1 «NP V NP.destination PP.theme»: agent=Agent they=Destination with handful=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
Eating dried fruit all day

```conllu
# sent_id = question:biology:352-teeth-enamel-sugar-holes-brushing-and-the-dentist:t11:o3:1
# text = Eating dried fruit all day
1	Eating	eat	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
2	dried	dry	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	amod	_	_
3	fruit	fruit	NOUN	NN	Number=Sing	1	obj	_	_
4	all	all	DET	DT	PronType=Tot	5	det	_	_
5	day	day	NOUN	NN	Number=Sing	1	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **eat** | gerund |  | dried fruit |  |  | day |  | vn eat-39.1-1 «NP V NP»: agent=Agent fruit=Patient |
| 2 | **dry** | participle |  |  |  |  |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |

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

<!-- .ven lang=en -->
Chewing the end of a twig into a brush

```conllu
# sent_id = question:biology:352-teeth-enamel-sugar-holes-brushing-and-the-dentist:t11:o4:1
# text = Chewing the end of a twig into a brush
1	Chewing	chew	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	end	end	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	twig	twig	NOUN	NN	Number=Sing	3	nmod	_	_
7	into	into	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	brush	brush	NOUN	NN	Number=Sing	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **chew** | gerund |  | the end of a twig |  | a brush |  |  | vn chew-39.2 «NP V NP»: agent=Agent end=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.

<!-- /div -->

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