A．Machines can do all the physical work for man.B．Machi-找考题网

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.

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S4. What’ s the main idea of Paragraphs 4 and 5

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