The country has already sent up three un
题型:选择题
问题:
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
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