问题

He realized his mistakes and took action toreduce the loss _______ it was too late.
A: until
B:when
C:before
D: as
B:when
C:before
D: as
正确答案是:
同类题型
I found my mom not feeling well this morning. I’mafraid she is ill.— _______.
Personally I think it is the sales manager, rather than the sales girls, _______ to blame.
That must have been a lot of work.—Yeah, it us three days to finish it
Is there a ______ near here I want to buy afootball.—Oh, yes! It’s next to the bookshop.