難度：★    考點：情態動詞

　　1. - Shall we take a taxi?

　　- No, we         . It's not far from here.

　　A. can't             B. mustn't            C, shouldn't         D. needn't

　　2. -Who is that?

　　-It _____ be Shirly. Only she is in red today .

　　A. could                  B. may                C. must

　　3. －_____ your brother speak Japanese?

　　－Yes, he has learnt it in Tokyo for three years.

　　A. Should            B. Must            C. Can            D. May

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