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．Detailed maps from previous studies.B．Recent advances in technology.C．Plenty of funding for the study.D．Experience carrying heavy loads up mountains.
A．Detailed maps from previous studies.
B．Recent advances in technology.
C．Plenty of funding for the study.
D．Experience carrying heavy loads up mountains.
单项选择题
A．Some shopkeepers are very rich.B．They need money to buy goods from abroad.C．Because paying taxes is all people’s obligation.D．Because the money is spent on things and services that they need.
A．Some shopkeepers are very rich.
B．They need money to buy goods from abroad.
C．Because paying taxes is all people’s obligation.
D．Because the money is spent on things and services that they need.
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