17. My parents live in a small village. They always keep candles in the house _____ there is a power out. (重庆卷)

A. if　　　　　　　　　　　　　　　　 B. unless　　　　　　　 　　 C. in case　　　　　　　　　　 　　 D. so that

16. Many of them turned a deaf ear to his advice, _______ they knew it to be valuable. (浙江卷)

　 A. as if　　　　　　　　 B. now that　　　　　　　 C. even though　　　　　 D. so that

15. It is difficult for us to learn a lesson in life ________ we’ve actually had that lesson. (天津卷)

A. until　　 　　　　　　　 　　B. after　 　　　　　　 　　　C. since　 　　　　 　　　　　D. when

14. 　　tomorrow, our ship will set sail for Macao. (上海春)

　　 A．However the weather is like　　　　　　　　　　　　　　　　　　　 B．However is the weather like

　　 C．Whatever is the weather like　　　　　　　　　　　　　　　　　　　 D．Whatever the weather is like

13. 　　there is a snowstorm or some other bad weather, the mail always comes on time. (上海春)

　　 A．Because 　　　　　　 B．If　　　　　　　 C．When　　　　　　　　　　 　 D．Unless

12. He was told that it would be at least three more months ___________he could recover and retum to work. (江西卷)

　 A. when　　　　　 B. before　　　　　　　 C. since　　　　　　 D. that

11. Most birds find it safe to sleep in the trees, but ________ they have eggs or young chicks, they don’t use a nest. (湖南卷)

　 A. why　　　　　 B. how　　　　　　　 C. unless　　　　　 D. where

10. You will be successful in the interview 　　　　　　you have confidence. (福建卷)

A. before　　 　　 B. once　　　　　　　　　　　　 　　 C. until　　　　　 　　 D. though

9.-Where’s that report?

　 -I brought it to you ____you were in Mr. Black’s office yesterday. (北京卷)

A. if　　　　　　　 B. when　　　　　　 C. because　　　　　 D. before

8. Leave your key with a neighbor ___　 you lock yourself out one day(北京卷)

A. ever since　　　　 B. even if　　　　　 C. soon after　　　　 D. in case