根据短文内容，从A、B、C三个选项中选择一个最佳答案。
When Sima Guang was a little boy, he often played with 21 friends in the backyard(后院).
One day, they were 22 in the backyard again. 23 boy said, "I can go to the 24 of the water vat(水缸). Do 25 believe it?" The water vat was very big 26 it was used to keep rainwater.
A girl said, "Don't go to the top of the water vat. It is too 27 !"
The boy said, "It is not dangerous for 28 !"Then he stood at the top of the water vat and said, "Look! Am I great?"
Just at that time, the boy fell 29 the water! He shouted, "Help! Help! I can't 30 . Please help me!" The girl was 31 and started to cry.
"We must find someone to 32 him," another boy said.
The other children 33 away except Sima Guang. "It needs too much 34 ," Sima Guang thought. Then he picked a rock and threw it at the water vat. The water flowed out of the broken(破碎的) water vat, and the boy was 35.
()21. A. her B. his C. your
()22. A. playing B. studying C. working
()23. A. A B. An C. The
()24. A. top B. under C. near
()25. A. we B. they C. you
()26. A. but B. and C. or
()27. A. funny B. long C. dangerous
()28. A. them B. us C. me
()29. A. out B. into C. over
()30. A. draw B. run C. swim
()31. A. scared B. happy C. friendly
()32. A. teach B. look C. help
()33. A. put B. ran C. took
()34. A. money B. time C. rock
()35. A. saved B. caught C. lost

21.B 解析:根据“He often played with...”可知,司马光经常和他的朋友玩耍。
22.A 解析:结合第一段和本句中的 again 可知,此处是指他们又一起在后院“玩耍”。
23.A 解析:此处表示泛指,且 boy 是以辅音音素开头的单词,因此用不定冠词 a,放在句首要大写。
24.A 解析:根据下文“Then he stood at the top of the water vat”可知选 A。
25.C 解析:结合句意,此处是男孩说:“你们相信吗?”。故选 C。
26.B 解析:“水缸很大”和“它是用来存放雨水的”之间为并列关系,故选 B。
27.C 解析:此处女孩是说那太危险了,故选 C。
28.C 解析:联系上下文可知,男孩说 那对他来说一点儿都不危险。此处是直接引语,故选 C。
29.B 解析:由下文司马光砸缸救了男孩可知,男孩掉进了水里。into 意为“到……里面”,符合语境。
30.C 解析:上文提到男孩掉进水里后大喊救命,所以此处男孩是说自己不会“游泳”,故选 C。
31.A 解析:结合上文中提到男孩掉进水里后大喊救命和该空后的 started to cry 可知,女孩很害怕。scared 意为“害怕的”,符合语境。
32.C 解析:结合句意可知,另一个男孩说要找人来“帮助”落水的男孩。
33.B 解析:结合句意可知,除了司马光,其他孩子都跑了。
34.B 解析:联系下文司马光捡起石头砸向水缸可知,此处应是司马光觉得找人帮忙需要太多“时间”。
35.A 解析:结合句意“水从破碎的水缸流出”可知,男孩得救了。