单项选择题

A．She hasn’t been getting adequate grades.
B．She has been overloading herself with homework.
C．She hasn’t been attending class on time.
D．She has been coming to school much too early.
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单项选择题
A．The mother and the son.B．The customer and the waiter.C．The teacher and the student.D．The doctor and the patient.
A．The mother and the son.
B．The customer and the waiter.
C．The teacher and the student.
D．The doctor and the patient.
单项选择题
In order to handle the greenhouse effect, the UNEP warns that ______.
A．the world must agree on what has caused the changing climate
B．the world must agree on what may result from the changing climate
C．all the countries should agree on how to reduce the greenhouse gases
D．all the countries should take part in looking for the solutions
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