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  Animals can learn to do many things that,                         1________

while not necessarily useful, are very amused to                         2________

watch at. Lions and tigers can be taught to jump or                      3________

to stay in place by command. Elephants learn to                         4________

walk in line, to lay on their sides, to stand on                            5________

their heads, or even to dance. Sometime a tiger is                       6________

taught to jump on elephant’s back. Both animals                         7________

become interested in the act as well as the praise                        8________

and food they received after the act, that                             9________

they forget themselves are natural enemies.                             10________

 

答案:
解析:

1.√ 

2.amused→amusing 

3.at去掉 

4.by→to 

5.lay→lie 

6.Sometime→Sometimes 

7.on∧→an 

8.become∧→so 

9.received→receive 

10.Themselves改成they

 


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