The country has already sent up 3 unmanned spacecraft, the most recent        at the end of last March.
#91255
A
was launched
B
being launched
C
has been launched
D
having been launched
推荐题目
Time ______, I’ll arrange for you to meet Professor Li before you leave for Japan.
#91224
A
permitted
B
permits
C
permitting
D
to be permitted
All her time __________experiments, she has no time for films.
#91114
A
devoted to do
B
is devoted to doing
C
devoted to doing
D
is devoted to do