More bison were killed.The bison population is thought ______ from 60 million to
题型:不详难度:来源:
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 |
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答案
A |
解析
考查句型;Sb /sth is thought to have done,某人据认为已经做了什么,句意是;更多的野牛被***死,野牛数量被认为在1850到1910之间已经从6千万下降到几百头了。选A。 |
举一反三
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