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
An American always walks ____________.
A．sadly
B．slowly
C．fast
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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