单项选择题

A．John is more likely to develop lung cancer.
B．Mary is more likely-to develop lung cancer.
C．John and Mary have the same chance to develop cancer.
D．Neither John nor Mary has the chance to develop cancer.
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单项选择题
A．To indicate how climbers communicated.B．To show that climbers enjoyed many comforts.C．To show that modern telephones work at high altitudes.D．To emphasize how small some equipment had become.
A．To indicate how climbers communicated.
B．To show that climbers enjoyed many comforts.
C．To show that modern telephones work at high altitudes.
D．To emphasize how small some equipment had become.
单项选择题
A．Governments.B．Shopkeepers.C．Doctors.D．Civil servants.
A．Governments.
B．Shopkeepers.
C．Doctors.
D．Civil servants.
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