题目内容

【题目】用适当的情态动词填空:

1. Nobody ____ live without air and water.

2. -- _____ he speak Chinese? --Yes,a little.

3. The book _____ be returned before Saturday.

4. -- _____ I come in? -- Yes,please.

5. You ____ give up smoking at once.It's bad for your health.

【答案】1. may 2. Could/ Can 3. must 4. have to 5. should

【解析】

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