We were about to go out for a walk ______ it began to rain.
#31592
A
while
B
before
C
as
D
when
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I thought her honest ___ I met her. 
#31490
A
first time
B
for the first time
C
the first time
D
by the first time
The day breaks,______ the birds are singing.
#79693
A
because
B
as
C
since
D
for