People ______always be careful with fire， or it can be dangerous.A．canB．needn’tC
题型：不详难度：来源：
People ______always be careful with fire， or it can be dangerous.| A．can | B．needn’t | C．must | D．shouldn’t |
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答案
| C |
解析
| 本题考查四个情态动词的含义，根据语境可知选择C表示必须之意。句意：人们必须一直对火小心，否则它可能很危险。 |
举一反三
—I saw Helen in the library this morning.
—No, it _________ her. She moved to France last week.
A. can’t be B. can be C. mustn’t be |
—Must I do my homework now, Mum?
—_______. You can do it tomorrow.| A．No, you needn’t | B．No, you mustn’t | C．Yes, you need | D．Yes, you must |
|
— Jim study hard these days?
—Yes, he will (将) take an exam (考试) next week.| A．Is, have to | B．Does, have to | C．Can, have to | D．Does, has to |
|
--- Another cup of coffee?
---No. thanks. I _____ be off. Marry is waiting for me. |
—Must I take much medicine every day?
—No, you ________.| A．must | B．mustn’t | C．needn’t | D．can’t |
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