Our teacher is always busy preparing lessons until 11 o’clock at night,        we students have gone to sleep.
#72594
A
that time
B
by which time
C
by that time
D
which time
推荐题目
It was funny that when _______ Mary began to weep sadly. 
#68175
A
praising
B
praised
C
to praise
D
having praised
(2014·济南4月巩固性训练)________it is,the boy never seems to be able to finish it off.
#66756
A
However interesting a book
B
Whatever interesting a book
C
How interesting a book
D
What an interesting book
 As ________ , they were waiting for us at the airport.
#72523
A
plan
B
planning
C
being planned
D
planned