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 |
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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 |