The country has already sent up three unmanned spacecraft,the most recent ________ at the end of last March.
#89158
A
has been launched
B
having been launched
C
being launched
D
to be launched
推荐题目
Measures must be taken to prevent pollution ________ happily.
#91813
A
from we live
B
for us to live
C
us living
D
from our living
It is time for class. Will you please get the blackboard__________?
#95522
A
to clean
B
cleaning
C
cleaned
D
having cleaned