阅读下面的短文， 掌握其大意， 然后从各题所给的三个选项中选出一个最佳答案。
My uncle Bob is a zoo keeper. His work is very interesting 31 it is hard. 32 it is dangerous. Every morning， Bob has to 33 at five thirty to give food to the animals. The lions like 34 meat. The deer like grass and leaves. The parrots like fruit and nuts. Bob 35 the cages every day.
Today， a mother monkey doesn’t eat food. Uncle Bob 36 her. He takes it to see the vet. Dr. Joseph has a look at her and 37 ， “She had bad food. Did you give her bad food yesterday？” Joseph asks Bob. “No， I 38 ，” Bob says.“I saw visitors giving food to her yesterday.”
If you visit a zoo， you 39 give food to animals. Some food is not good for them. This is a rule in a zoo. Dr. Joseph gives some medicine to her. Then the mother monkey becomes 40 .
（ ）31. A. and B. or C. but
（ ）32. A. Sometimes B. Some time C. Every time
（ ）33. A. put up B. get up C. set up
（ ）34. A. eating B. eat C. ate
（ ）35. A. washed B. cleans C. brushes
（ ）36. A. looks for B. takes care of C. look after
（ ）37. A. says B. said C. say
（ ）38. A. don’t B. doesn’t C. didn’t
（ ）39. A. won’t B. didn’t C. mustn’t
（ ）40. A. better B. worse C. cute
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答案及解析
