---DidyouhearJuliasinginginthemusicroomatninelastnight...

問題詳情：

 ---Did you hear Julia singing in the music room at nine last night?

 ---No, it ________ be Julia. She has gone to Paris.

   A. may not               B. can’t                     C. mustn’t                     D. couldn’t

【回答】

B

知識點：情態動詞

題型：選擇題