Question

It was announced that only when the fire was under control_______to return to their homes.

A．the residents would be permitted	B．had the residents been permitted
C．would the residents be permitted	D．the residents had been permitted

Answer 1

C

试题分析：句意:这里公告只有火势被控制住了居民才可以重返家园。这里it是形式主语，that引导的是主语从句，在这个主语从句中，把only放在句首，后面的主句用部分倒装，故排除AD，根据句意居民将要返回家园，所以应该用过去将来时，故选C。
点评：本题难度适中。倒装及动词的时态是高中阶段的重要的两项语法项目，它们的各种情况比较多，需要考生牢记它们的用法，但是把两者结合一起来考查更增加了试题的难度。
即学即练:According to the law, it is ______get your license.
A. not until you’re eighteen can you
B. until you’re eighteen that you can’t
C. not until you?re eighteen that you can
D. until you’re eighteen when you can’t
解析：C。含有not ...until的句子的强调句用It is/was+not until ...+that ...句型。