单项选择题

A．They reduce a person’’s appetite.
B．They make a person less persistent in face of trouble.
C．They make a person’’s nervous system weak.
D．They make a person more vulnerable to disease.
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单项选择题
A．To speak English.B．To read technical books in English.C．To listen to English programs on radio.D．To read English literature.
A．To speak English.
B．To read technical books in English.
C．To listen to English programs on radio.
D．To read English literature.
单项选择题
A．She’’ll teach the man to operate the computer.B．She doesn’’t think his sister is a good typist.C．She thinks the man should buy a computer.D．She’’ll type the letter for the man.
A．She’’ll teach the man to operate the computer.
B．She doesn’’t think his sister is a good typist.
C．She thinks the man should buy a computer.
D．She’’ll type the letter for the man.
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