单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．The long wait.
B．The broken-down computer.
C．The mistakes in her telephone bill.
D．The bad telephone service.
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单项选择题
A．There aren’t enough cabinets.B．There is too much noise.C．Office supplies are taking up space.D．Some teaching assistants don’t have desks.
A．There aren’t enough cabinets.
B．There is too much noise.
C．Office supplies are taking up space.
D．Some teaching assistants don’t have desks.
单项选择题
A．If they don’t involve any risks.B．If they produce predictable side effects.C．When the urgent need for them arises.D．When tests show that they are relatively safe.
A．If they don’t involve any risks.
B．If they produce predictable side effects.
C．When the urgent need for them arises.
D．When tests show that they are relatively safe.
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