单项选择题

A．Assistant and customer.
B．Doctor and patient.
C．Teacher and student.
D．husband and wife.
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单项选择题
A．He should travel by air more often.B．He should ask the doctor for some advice.C．He should take some medicines.D．He should get rid of his nervousness.
A．He should travel by air more often.
B．He should ask the doctor for some advice.
C．He should take some medicines.
D．He should get rid of his nervousness.
单项选择题
A．It’s another possible use for seawater.B．It’s necessary for growing vegetables in hot climates.C．It’s used for producing electricity in the US.D．It makes people comfortable in hot days.
A．It’s another possible use for seawater.
B．It’s necessary for growing vegetables in hot climates.
C．It’s used for producing electricity in the US.
D．It makes people comfortable in hot days.
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