单项选择题

A working American has to work ______ days a week in his working time.

A． seven
B． six
C． five
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单项选择题
The writer is a ______.
A． student who was born in America
B． student who came from China
C． Student who didn't like to study
单项选择题
He is living on borrowed time means ______ .
A． He is dying
B． He is dead
C． He has little money
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