单项选择 较易0.85 引用0 组卷55
—Sir, you ________ use your mobile phone at the gas station. It’s very dangerous.
—Sorry, I won’t.
—Sorry, I won’t.
| A．mustn’t | B．may not | C．needn’t | D．don’t have to |
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That’s a quite easy question. I ________ think about it before giving you my answer.
| A．needn’t | B．can’t | C．mustn’t | D．shouldn’t |
—Who is the boy with a cap? It looks like John.
—It ________ be him. He is in Mr. Hu’s office now.
—It ________ be him. He is in Mr. Hu’s office now.
| A．mustn’t | B．can’t | C．must | D．may |
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