The new system needs to be in operation for five months ________ it can be updated.
#30274
A
as
B
while
C
before
D
once
推荐题目
It must have rained last night, ________ the ground is wet now.
#31320
A
for
B
because
C
since
D
now that
---What can I do for you, Sir?---It is not you waiters but ____ is in charge of the restaurant ___ I want to talk to.
#33040
A
whoever; that
B
who; that
C
that; who
D
that; whom
How did you manage to get to school on time ______ you missed the school bus?
#79910
A
when
B
if
C
once
D
because