单项选择题

I know only a little （）computers.

A.about    
B.over      
C.at

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单项选择题
When does the man suggest they go
A. This afternoon.
B. Tomorrow afternoon.
C. Tomorrow.
单项选择题
How old is the man’s grandma（）

A. She is 57 years old.
B.She is 53 years old.
C.She is 54 years old.
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