单项选择题

A．Cotton.
B．Coffee.
C．Iron.
D．Rubber.
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单项选择题
A．Machines can do all the physical work for man.B．Machines can do all the mental work for man.C．All heavy labor should be replaced by machines.D．All heavy labor shouldn’t be replaced by machines.
A．Machines can do all the physical work for man.
B．Machines can do all the mental work for man.
C．All heavy labor should be replaced by machines.
D．All heavy labor shouldn’t be replaced by machines.
单项选择题
A．Three.B．Twenty - four.C．Two hundred.D．Eight.
A．Three.
B．Twenty - four.
C．Two hundred.
D．Eight.
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