It _______ long ______ we know the result of the experiment.
#40329
A
will not be, before
B
is, after
C
will not be, until
D
is, before
推荐题目
Neither you or he ______ Hawaii before.
#41934
A
has gone to
B
have gone to
C
have been to
D
has been to
Don’t make any noise. The pandas        over there. 
#39700
A
are sleeping
B
have slept
C
will sleep
D
were sleeping