问题

He realized his mistakes and took action toreduce the loss _________ it was too late.

A: until
B:when
C:before
D: as

正确答案是：

同类题型

Has Mr.Lee arrived?—No.But it’s already 9 o’clock.He should __________ at any time.[ ]

Which floor do you______ in this building

The command has just arrived that all employees____________ in their proper uniforms before 7:00 pm.

You can improve your English ______ practicing more.

It is selflessthe mostbeautiful teacher—Yang Xiangming to lose his lifethechild in the river.—I think so, he is so great.