Our teacher is always busy preparing lessons until 11 o’clock at night, _____we students have gone to sleep.
#72213
A
that time
B
by which time
C
by that time
D
which time
推荐题目
—Where did you find our chemistry teacher? —It was in the lab ______ he was doing his experiment.
#67244
A
that
B
where
C
which
D
in which
7. You should put on the notices ______ all the people may see them.
#72578
A
where
B
in which
C
at
D
for them