A severe earthquake ________ Ya'an on April,20th, which has claimed 193deaths up to  now.
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A
attacked
B
hitted
C
knocked
D
struck
推荐题目
What ______just now? 
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A
was happened 
B
were happened  
C
happened 
D
happens
4.It is said that the early European playing-cards ____ for entertainment and education. 
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A
were being designed
B
have designed
C
have been designed
D
were designed