问题
选择题
For a long time, he hesitated whether he should tell us ____ what had happened.
A.at dusk
B.at length
C.at present
D.at stake
答案
答案:B
词义辨析题。A.at dusk 在黄昏时刻 B.at length 详尽地C.at present目前 D.at stake 在危急关头 根据句意:他犹豫了好长时间是否要详尽的告知我们所发生的事情。选B