---Has Tom finished his job yet?
---I have no idea of it; he _____ it this morning.
A.has been doing
B.had been doing
C.did
D.was doing
答案:D
考查时态。表示过去某一时刻正在进行的动作用过去进行时态。句意:汤姆完成他的工作了吗?我不清楚,他整个上午一直在做。所以选D。
---Has Tom finished his job yet?
---I have no idea of it; he _____ it this morning.
A.has been doing
B.had been doing
C.did
D.was doing
答案:D
考查时态。表示过去某一时刻正在进行的动作用过去进行时态。句意:汤姆完成他的工作了吗?我不清楚,他整个上午一直在做。所以选D。