It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
#103104
A
caused, realized
B
had caused, realized
C
caused, had realized
D
was causing, had realized
推荐题目
--- Why does the lake smell terrible?--- Because large quantities of water _________.
#101273
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
Michael knew he would certainly get ______ if he was late home.
#99254
A
shouting at
B
shouted at
C
to shout at
D
to be shouted at
Would you please keep silent? The news that the milk contains a harmful chemical _________and I want to listen. 
#101847
A
has been broadcast
B
is being broadcast
C
is broadcast
D
is broadcasting