题目内容
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
B
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题目内容
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
B