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 From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.
#33837
A
when
B
until
C
since
D
before
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It was not just the size of the party last night _______ made it unique, but ________ it meant to our school.
#33293
A
what; that
B
that; what
C
what; what
D
that; that
Three years had gone by ____ he came to realize what a fool he was not to listen to the teachers ! 
#34381
A
until
B
since
C
before
D
after
The reason _____ he refused to attend the meeting was that they didn’t give him an invitation earlier.
#33657
A
how
B
which
C
why
D
because
You cannot take back your words _________ they are out of your mouth.
#30113
A
before
B
whether
C
once
D
while
---We’ve seen many more days of blue skies recently.   ---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky”     program, the city only ________ about 100 days a year.  
#34101
A
which, sees
B
that, saw
C
when, saw
D
and, seeing
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