I wonder _________Eddie has gone to Singapore.
#38923
A
how long
B
how often
C
when
D
if
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Nobody knows ______ yesterday.
#36964
A
how the accident happens
B
how does the accident happen
C
how the accident happened
D
how did the accident happen
He said _____ he would come back in a week. 
#37809
A
when
B
what
C
that
D
why