The buses, most of _________ were already full, were surrounded by an angry crowd.
#73436
A
that
B
it
C
them
D
which
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However,     happened later proved me wrong.
#71662
A
what
B
that
C
which
D
no matter what
Many experts agree that there is a possibility___ in this area in the following days.
#69074
A
when some more earthquakes may happen
B
that some more earthquakes may happen
C
where may some more earthquakes happen
D
what may some more earthquakes happen