单项选择题

A．Ask Dr. Smith to alter his decision.
B．Ask Dr. Smith to call the library.
C．Get the book directly from Dr. Smith.
D．Get Dr. Smith’’s written permission.
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单项选择题
A．To check the accuracy of scales.B．To calculate the density of other metals.C．To observe changes in the atmosphere.D．To measure amounts of rainfall.
A．To check the accuracy of scales.
B．To calculate the density of other metals.
C．To observe changes in the atmosphere.
D．To measure amounts of rainfall.
单项选择题
A．People who are in the habit of switching from one bank to another.B．Young people who are fond of modern technology.C．Young people who are wealthy and well-educated.D．People who have computers at home.
A．People who are in the habit of switching from one bank to another.
B．Young people who are fond of modern technology.
C．Young people who are wealthy and well-educated.
D．People who have computers at home.
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