单项选择题

Man has （）been to the Moon

A. last  
B. already 
C. ago  
D. in

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单项选择题
It has alway （）my dream to work for a big company

A. be   
B. been
C. being  
D. was
单项选择题
You （）sick for five days. Maybe you should see a doctor

A. will be
B. are
C. were  
D. have been
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