---I’msorrythatI’vekeptyourbookforsolong. Ipromisetoret...

問題詳情：

---I’m sorry that I’ve kept your book for so long.  I promise to return it soon.

   ---No, you _________. Just take your time.

A. can’t          B. mustn’t       C. shouldn’t      D. needn’t

【回答】

D

知識點：情態動詞

題型：選擇題