My father was reading newspapers ____ my mother was cooking at this time yesterday evening. 
#41399
A
when
B
which
C
while
D
because
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——I don’t know if he ________ tomorrow?——If it ________ , he will come.
#41280
A
will come; won’t rain
B
will come; doesn’t rain
C
comes; doesn’t rain
D
comes; won’t rain
—What time will Mr. Brown be back to China? —Sorry. I don’t know______.
#70080
A
when did he go abroad
B
why he is going abroad
C
how soon will he be back
D
how long he will stay abroad