三、完形填空：（共20小题；每小题1分，满分20分）
One day a mother rat and her babies were out in an open field. They were playing and having a good time when ___21___ a hungry cat came on the scene! It hid ___22___ a big tree and then ___23___ forward through tall grass ___24___ it could almost hear them talk. ___25___ the mother rat and her babies knew ___26___ had happened, the cat ___27___ from its hiding-place and started to run ___28___ them.
The mother rat and her babies all ___29___ at once. They hurried towards ___30___ home, which was under a pile of large stones. ___31___ the baby rats were ___32___ scared that they could not run very ___33___. Closer and closer the cat came. In no time the cat could catch ___34___. What was to be done?
The mother rat stopped running, ___35___ round and faced the cat, ___36___, “Wow! Wow! Wow-wow!” just like ___37___ angry dog. The cat was so surprised and ___38___ that it ran away.
The mother rat turned to her babies, “Now you see ___39___ important it is to learn ___40___ second language!”
21. A. naturally B. suddenly C. nearly D. certainly
22. A. or B. between C. by D. behind
23. A. crawled B. jumped C. looked D. climbed
24. A. before B. when C. until D. while
25. A. Before B. After C. Unless D. Otherwise
26. A. where B. what C. which D. when
27. A. jumped B. started C. walked D. appeared
28. A. over B. through C. after D. against
29. A. stood B. fled C. left D. cried
30. A. to B. for C. its D. their
31. A. Because B. But C. Therefore D. Although
32. A. as B. much C. so D. very
33. A. freely B. hardly C. soon D. quickly
34. A. ahead B. down C. that D. them
35. A. turned B. walked C. jumped D. ran
36. A. saying B. speaking C. shouting D. telling
37. A. a B. an C. their D. that
38. A. pleased B. excited C. frightened D. worried
39. A. so B. why C. what D. how
40. A. our B. their C. a D. An
