用所给单词的正确形式填空

2023-01-10

【题目】用所给单词的正确形式填空。

1. It’s time _______ (have ) lunch.

2. Miss Li__________(buy) some flowers last Sunday.

3. We shouldn’t ______( throw) rubbish anywhere.

4. Smoke from factories ___________ (make)our city dirty.

5. It means“No ____________(smoke)”.

6. What can we do ________ (keep) the city clean ?

7. The sign on the wall ________ (mean) “No littering”.

8. What happened ? I ________ (lose) my kite just now.

9. Water is useful for us. We use water ___________ (clean) things.

10. The floor is wet. Be __________ (carefully).

【答案】1.to have 2.bought 3.throw 4.makes 5.smoking 6.to keep 7. means 8.lost 9.to clean 10.careful

【解析】

1. it is time to do sth到时间做某事了。

2. 时间状语是last Sunday，故用一般过去时。

3. Should 是情态动词，后面加动词原形。

4. Smoke做主语，动词用三单形式。

5. No smoking 不要吸烟。

6. to do 不定式做目的状语。

7. The sign做主语，动词用动词第三人称单数形式。

8. just now是表示过去的时间，用动词过去式。

9. to do 不定式做目的状语。

10.be动词后用形容词形式。

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