41. We should take good care of our eyes .
A. only when we can see well
B. only when we cannot see perfectly
C. even if we can see well
D. only when we realize how important our eyes are
29. A. possibility B. feasibility C. hope D. result
28. A. every B. no C. this D. another
27. A. simple B. easy C. necessary D. difficult
26. A. prepare B. regret C. decline D. expect
25. A. offer B. hesitate C. refuse D. mean
24. A. work B. live C. play D. eat
23. A. trouble B. concept C. choice D. method
22. A. Moreover B. Meanwhile C. Therefore D. However
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