—IhearMrZhanghasgonetoBeijingforameeting.—Really?Doyouk...

問題詳情：

—I hear Mr Zhang has gone to Beijing for a meeting.

—Really? Do you know when he ________？

A．leaves                                            B．was leaving

C．has left                                          D．left

【回答】

D

知識點：動詞時態

題型：選擇題