单项选择题

A．To emphasize the dangers of the old method.
B．To explain a step in the new technique.
C．To show that the treatment will not cause fire.
D．To illustrate a combination of old and new treatment.
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单项选择题
Dogs and cats are similar in that________.
A．people can use them for hunting
B．they are associated with man closely
C．they have the same way of living
D．they are equally liked by people
单项选择题
A．Tell her what to study for the history test.B．Write a favorable letter of recommendation.C．Advise her about how to run an election campaign.D．Suggest a topic for a research paper.
A．Tell her what to study for the history test.
B．Write a favorable letter of recommendation.
C．Advise her about how to run an election campaign.
D．Suggest a topic for a research paper.
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