17. _______ I felt very tired, I tried to finish the work.

　 A. Although　 B. Because　 C. As　 D. As if

16. Mary had ______ much work to do that she stayed at her office all day.

　 A. such　 B. so　 C. too　 D. very

15. It is ______ that we’d like to go out for a walk.

　 A. a lovely day　　 B. too lovely a day

　 C. so lovely a day　 D. such lovely a day

14. He took off his coat _______ he felt hot.

　 A. because　 B. as　 C. if　 D. since

13. The teacher raised his voice _______ all the students could hear him.

　 A. for　 B. so that　 C. because　 D. in order

12. When you read the book, you’d better make a mark _______ you have any questions.

　 A. which　 B. that　 C. where　 D. though

11. I hurried _____ I wouldn’t be late for class.

　 A. since　 B. so that　 C. as if　 D. unless

10. You should finish your lessons _______ you go out to paly.

　 A. before　 B. after　 C. when　 D. while

9. In the exam, the ________ you are, ______ the _______ mistakes you will make.

　 A. careful; little　　 B. more careful; fewest

　 C. more careful; fewer　 D. more careful; less

8. I’ll go swimming with you if I ________ free tomorrow.

　 A. will be　 B. shall be　 C. am　 D. was