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> Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, _____
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, _____
题目简介
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, _____
题目详情
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________?
A.isn't it
B.does it
C.doesn't it
D.is it
题型:单选题
难度:中档
来源:不详
答案
C
C 考察反义疑问句。当反义疑问句的陈述部分是肯定形式的时候,疑问部分使用否定形式,排除BD,根据陈述部分的seems可知doesn’t it符合题意。故C正确。
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题目简介
Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, _____
题目详情
答案