The country has already sent upthree unm
题型:选择题
问题:
The country has already sent up three unmanned spacecrafts, 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 spacecrafts, the most recent at the
end of last March. [ ]
A.has been launched
B.having been launched
C.being launched
D.to be launched