题目内容
Every possible means_____ but unsuccessful. We have to finish the task______.
A.have been tried; by this means B.has been tried; in this way
C.has been tried; in this means D.are tried; by this means
B
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题目内容
Every possible means_____ but unsuccessful. We have to finish the task______.
A.have been tried; by this means B.has been tried; in this way
C.has been tried; in this means D.are tried; by this means
B