I could never understand __________． -考呗网题库移动版

单选题I could never understand __________．

A． why did Jane do such a crazy thing
B． why Jane does such a crazy thing
C． why Jane has done such a crazy thing
D． why Jane did such a crazy thing

参考答案D

解析:译文：我不能理解，简为什么会做出这么疯狂的事。
宾语从句题。understand后边接的是宾语从句，宾语从句中要用陈述句语序，主句动词是一般过去时，宾语从句也应该使用过去时态，因此答案为[D]。

单选题It is not until midnight __________ he finished the report.

A． before
B． when
C． after
D． that

单选题Three pints __________ enough to get me drunk．

A． aren't
B． isn't
C． hadn't
D． haven't

单选题It is high time that we __________ some measures to deal with the water pollution.

A． will take
B． must take
C． took
D． shall take