—Where'sDavid?  —He       beintheplaygroundbecauseheisf...

問題詳情：

— Where's David? 

  — He        be in the playground because he is fond of playing basketball.

  A. will    B. may   C. can't   D. mustn't

【回答】

B

知識點：情態動詞

題型：選擇題