I would appreciate it ________ you call back this afternoon for the doctor's appointment.
#67449
A
until
B
if
C
when
D
that
推荐题目
The most important thing ______they need is more time .
#72960
A
what
B
that
C
which
D
in which
 The question is too difficult and we found ________.
#66590
A
it not easy to answer it
B
it was not easy for us to answer it
C
it’s not easy to answer
D
it not easy to answer