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13. ________ your composition carefully, some spelling mistakes can be avoided.

A. Having checked                            B. Check

C. If you check                                D. To check

14. I would never speak to someone like that ________ they said something unpleasant to me.

A. even if                                         B. so that

C. as if                                            D. ever since

15. －Did you remember to return the book to our English teacher?

－Yes. I gave it to him ________ I saw him.

A. once                                           B. while

C. if                                                D. the moment

16. A warning news report from Qatar announces that a group of Islam will continue to kill Americans wherever they are ________ they leave the Arab world forever.

A. even though                                 B. in case

C. whenever                                    D. until

17. —May I go now?

— ________ you’ve finished your work, you may go.

A. After                                           B. Although

C. Now that                                     D. As soon as

18. " ________ I live there are plenty of sheep." said the boy ________ pride.

A. Where; with                                 B. When; in

C. That; in                                        D. Why; with

19. He seemed to have been asleep, so I said nothing, but sat ________ he would see me ________ waking.

A. whether; when                             B. that；when

C. which；where                             D. where；when

20. It will be five years ________ we meet again.

A. since                                           B. until

C. before                                         D. when

21. Never lose heart ________ difficulty you may meet with.

A. what                                           B. whatever

C. how                                            D. however

22. ________ we are allowed ________ , we can’t drink any beer.

A. As long as; to do                          B. If; to

C. Unless; to                                    D. On condition that; doing so

23. You can still find bones of the birds ________ they used to live.

A. in which                                     B. in the place

C. where                                         D. that

24. How can they learn anything ________ they spend all their spare time watching TV?

A. where                                         B. when

C. while                                          D. but

25. ________ I admit that there are problems, I don’t agree that they cannot be solved.

A. While                                          B. If

C. As                                              D. Unless

26. “________ my feet remain standing above the water level, there is hope...” said the captain.

A. Where                                         B. Even if

C. While                                          D. Although

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