单项选择题

A．To have his blood tested early.
B．To take food rich in vitamins.
C．To have regular vitamin injections.
D．Not to believe his doctors.
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单项选择题
A．About twelve days.B．About two weeks.C．About two days.D．About eight days.
A．About twelve days.
B．About two weeks.
C．About two days.
D．About eight days.
单项选择题
A．Unusual ways to advertise products.B．Types of payment plans for services.C．Theories about how products affect different levels of society.D．How certain elements of a price package influence its market value.
A．Unusual ways to advertise products.
B．Types of payment plans for services.
C．Theories about how products affect different levels of society.
D．How certain elements of a price "package" influence its market value.
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