问题

It took me a long time before I was able to fully appreciate what they ______ for me

A:had done
B:did
C:would do
D:were doing

正确答案是：

同类题型

Whenever he worked until midnight, he _____ drink some coffee to get refreshed．

She read the instructions to find out how_______the computer.

_____ the life in thecountry

Be patient, John. Don’t give up. Have ______ try. I’m sure you can do it.

She is not __________ to pass the examination as she doesn’t work hard.