—It’sdifficulttodrivetoworkduringtherushhour. —Iagree....

問題詳情：

 —It’s difficult to drive to work during the rush hour.   —I agree. That’s why I __________ to work on foot since last month.   A. have gone                     B. was going              

C. have been going           D. will have gone

【回答】

C

知識點：動詞時態與語態

題型：選擇題