15. ________ you have tried it, you can’t imagine how pleasant it is. (2006年北京)
A. Unless B. Because C. Although D. When
14. In time of serious accidents, _______ we know some basic things first aid, we can save lives.
(2006年重庆)
A. whether B. until C. if D. unless
13. Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.
(2007年浙江)
A. as if B. now that C. even though D. so that
12. My parents live in a small village. They always keep candles in the house_______ there is a power cut.
(2007年重庆)
A. if B. unless C. in case D. so that
11. He was told that it would be at least three more months, ______ he could recover and return to work.
(2007年江西)
A. when B. before C. since D. that
10. _______ I really don’t like are, I find his work impressive. (2007年山东)
A. As B. Since C. If D. While
9. You will be successful, in the interview_______ you have confidence. (2007年福建)
A. before B. once C. until D. though
8. The field research will take Joan and Paul about five months; it will be a long time________ we meet them again. (2007年安徽)
A. after B. before C. since D. when
7. Most birds find it safe to sleep in the trees, but_______ they have eggs or young chicks, they don’t use a nest. (2007年湖南)
A. why B. how C. unless D. where
6. -______ when has the country been open to international trade?
-1978, I suppose. (2007年陕西)
A. Since B. In C. From D. After
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