The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent         cause a series of explosions of the nuclear reactors in several power stations.
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A
to
B
that
C
as to
D
as that
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The students asked me ____________ going to be held.
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A
when is the meeting
B
when the meeting was
C
if was the meeting
D
if the meeting is
_____, and I believe you will realize your dream. 
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A
Making a little bit more effort
B
Make a little bit more effort
C
To make a little bit more effort
D
If you make a little bit more effort
.It is the first time the students ________ to Hyde Park.
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A
have gone
B
have been gone
C
had gone
D
had been gone
I ______ myself more-----it was a perfect day.
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A
shouldn’t have enjoyed
B
needn’t have enjoyed
C
wouldn’t have enjoyed
D
couldn’t have enjoyed