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

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

18. We had to wait half an hour _____ we had already booked a table.

A. since B. although C. until D. before

19. --- Wheres that report? --- I brought it to you ______ you were in Mr. Blacks office yesterday.

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

20. --- Have you got any idea for the summer vacation?

--- I dont mind where we go ______ theres sun, sea and beach.

A. as if B. as long as C. now that D. in order that

21--- Do you have a minute? Ive got something to tell you.

--- Ok, ______ you make it short.

A. now that B. if only C. so long as D. every time

22. Nancy enjoyed herself so much _____ she visited her friends in Sydney last year.

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

23. John thinks it wont be long ______he is ready for his new job.

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

24. He found it increasingly difficult to read, ______ his eyesight was beginning to fail.

A. though B. for C. but D. so

25. Youd better not leave the medicine ______ kids can get it.

A. even if B. which C. where D. so that

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