—Didyougettotherailwaystationontime?—Sure.Thecitycenter...

問題詳情：

—Did you get to the railway station on time?

—Sure. The city center wasn’t as crowded this morning as it usually _____.

A. is     B. was         C. has been         D. had been

【回答】

A

知識點：一般現在時及其被動式

題型：選擇題