问题

There is no point making complaint of getting low-paid ______ you don’t make any effort at all

A:until
B:when
C:once
D:though

正确答案是：

同类题型

In our city, _____ middle school students want to work as a teacher in the future.

Don’t trust such people _____ praise you toyour face but speak ill of you behind your back

Some drunken drivers think that they may be luckyto________a fine, which may cost their own lives.

The girl has a great interest in sport and _______ badminton classes twice a week over the last three years.

下列各句中，没有错别字的一项是（）