Many accidents_____ by careless drivers last year. 
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A
are caused
B
were caused
C
have caused
D
will cause
推荐题目
An official ___________ by some reporters on food problems in Shanghai yesterday.
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A
is interviewing
B
is interviewed
C
was interviewing
D
was interviewed
 The 30th London Olympic Games ____________ on July 27th, 2012.
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A
will be held
B
is held
C
was held    
D
has been held
The little boy ____ by the big one this morning. 
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A
made cry
B
was made cry
C
made to cry
D
was made to cry