B. 完型填空
以下短文中共包含10个未完成的句子，针对每个句子中空缺部分有4个选项，请从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并用铅笔将答题卡上的相应字母涂黑。
Adults are often surprised by how well they remember something they learned as children but have never practised in the meantime. A man who has not had an opportunity to go swimming for years can 21 swim as well as ever when he gets back in the water. He can got on a bicycle after several decades and still 22 away. A mother who has not 23 the words for years can teach her daughter the poem that begins “ Twinkle, twinkle, little star” or recite the story of Cinderella or Snow White.
One explanation is the law of over learning, which can be stated as following: 24 we have learned something, additional learning increases the 25 of time we will remember it.
In childhood, we usually continue to practise such skills as swimming, bicycle riding long after we have learned them. We continue to listen to and 26 ourselves of poems such as “Twinkle, twinkle, little star” and childhood tales such as Cinderella or Snow White. We no only learn but 27 .
The law of over learning explains why cramming (突击学习) for an examination, 28 it may result in a passing grade, is not a 29 way to learn a school course. By cramming, a student may learn the subject well enough to get by on the examination, but he is likely soon to forget almost everything he learned. A little over learning; 30 , is usually a good investment toward the future.
21. A. only B. hardly C. still D. even
22. A. more B. drive C. travel D. ride
23. A. thought about B. cared for C. showed up D. brought up
24. A. Before B. Once C. Until D. Unless
25. A. accuracy B. unit C. limit D. length
26. A. remind B. inform C. warm D. recall
27. A. recite B. overlearn C. research D. improve
28. A. though B. so C. if D. after
29. A. convenient B. demanding C. satisfactory D. swift
30. A. at most B. by the way C. on the other hand D. in the end