Thecountryhasalreadysentupthreeunmannedspacecraft,themo...
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问题详情:
The country has already sent up three unmanned spacecraft, the most recent _______at the end of last March.
A.has been launched B.having been launched C.being launched D.to be launched
【回答】
B
知识点:主谓一致
题型:选择题
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