单项选择题

We were swimming in the lake suddenly the storm started.

[A] when
[B] while
[C] until
[D] before
<上一题 目录 下一题>
热门 试题

单项选择题
-The cars give off a great deal of waste gas in the streets. -Yes. But I'm sure something will be done to ______air pollution.
[A] reduce
[B] remove
[C] collect
[D] warn
单项选择题
In some parts of London, missing a bus means ______for another hour.
[A] to wait
[B] wait
[C] waiting
[D] waited
相关试题