____ the flight to Beijing will be delayed is ____ I’m especially worried about.
#69040
A
If; what
B
Whether; that
C
When; that
D
Whether; what
推荐题目
There were two small rooms in the house, _____ served as a kitchen. 
#71984
A
the smaller one of which
B
the small one
C
the smaller of them
D
and the smaller one of which
I coutdn't have got to the meeting on time____________ an earlier train.
#72090
A
if I had not caught
B
unless I had caught
C
if ! did not catch
D
unless I caught