单项选择题

A．Warn us of the danger of smoking before children.
B．Warn people with breathing problems not to smoke.
C．Warn us that mothers who smoke may affect their children’s health.
D．Warn us that fathers who smoke may affect their children as mothers.
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单项选择题
A．He didn’t work hard in school.B．He took a part-time job in school.C．He had always been serious about study.D．He had no interest in social work.
A．He didn’t work hard in school.
B．He took a part-time job in school.
C．He had always been serious about study.
D．He had no interest in social work.
单项选择题
A．The design of stamps.B．The color of stamps.C．The words on many stamps.D．The size of the stamps.
A．The design of stamps.
B．The color of stamps.
C．The words on many stamps.
D．The size of the stamps.
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