--.—Excuseme,Mum.Whencanwehavedinner?—Notuntilit  

問題詳情：

-- . —Excuse me, Mum. When can we have dinner? —Not until it  _________     in half an hour.  A. is prepared                B. will be prepared  C. has been prepared       D. was prepared     

【回答】

A

知識點：動詞時態

題型：選擇題