I’m writing to ask ______ you can do me a favor. 
#78994
A
that
B
what
C
where
D
whether
推荐题目
―Do you know       tomorrow? ―At 8 o’clock.
#38323
A
when did she come
B
when she came
C
when will she come
D
when she will come
--- Sam, do you know when Alice ______to my party ? ---I think she will come when she ______free .
#37195
A
comes; is
B
comes ; will be
C
will come ; is
D
will come ; will be