—Is Jack on duty today? —It ______ be him. It is his turn tomorrow.A．mustn’t B．w
题型：不详难度：来源：
—Is Jack on duty today? —It ______ be him. It is his turn tomorrow.| A．mustn’t | B．won’t | C．can’t | D．needn’t |
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答案
| C |
解析
| 情态动词表示推测,肯定性推测用must,否定性推测要用can’t. |
举一反三
| ________you play the violin? |
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