单选题：Our government has done a lot to solve the shortage of oil, ..

题目内容：

Our government has done a lot to solve the shortage of oil, but it may take some time _____ we have enough.
A. after
B. since
C. before
D. unless

参考答案：

They fell in love with each other in the 1980's. It took q..

They fell in love with each other in the 1980's. It took quite a long time _____ they got married.A. before B. that C. when D. since

分类：从属连词题型：单选题

—There's someone knocking on the door．Whoit be?—It must be Mary．She promised to be here at 8：00．A．mustB．canC．shall D．need

分类：从属连词题型：单选题

— Do you like the material? — Yes, it _____ very soft.A. is feeling B. felt C. feelsD. is felt

分类：从属连词题型：单选题

It seemed _____ the world was at _____ end.A. as if…an B. as if… the C. even if… anD. even if…the

分类：从属连词题型：单选题

I lived with my brother this winter and didn’t have to pay rent. So I ________ save most of my salary.A．couldB．wouldC．was able toD．should

分类：从属连词题型：单选题