题目内容
__________ the bison had a bad effect on the whole wildlife chain of the plains.
[ ]
A. Kill B. The killing C. Killing of D. Killing
答案:D
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相关题目
More bison were killed.The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
|
A.to have fallen |
B.having fallen |
|
C.to fall |
D.falling |