10. Busy _____ he was， he tried his best to help you.
A. as B. when C. since D. for
11. I learned a little Russian _____ I was at middle school.
A. though B. although C. as if D. when
12. _____ we got to the station， the train had left already.
A. If B. Unless C. Since D. When
13. _____ the rain stops， we‘ 11 set off for the station.
A. Before B. Unless C. As soon as D. Though
14. She was _____ tired _____ she could not move an inch.
A. so， that B. such， that C. very， that D. so， as
15. We didn’t go home _____ we finished the work.
A. since B. until C. because D. though
16. I‘ll stay here _____ everyone else comes back.
A. even if B. as though C. because D. until
17. Although it’s raining， _____ are still working in the field.
A. they B. but they C. and they D. so they
18. Speak to him slowly _____ he may understand you better.
A. since B. so that C. for D. because
19. You‘ll miss the train ______ you hurry up.
A. unless B. as C. if D. until
20. When you read the book， you’ d better make a mark _____ you have any questions.
A. at which B. at where C. the place D. where
11~15DDCAB 16~20DABAD
