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单项选择题

您的浏览器不支持 audio 元素。

A.She’s not sure if the computer is fixed.
B.She has to post a letter instead.
C.She can’t send the message right now
D.She has to mm down the man’s request.
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单项选择题A.The woman knows the professor has been busy.B.The woman regrets having taken up much of the professor’s time.C.The woman has trouble getting along with the professor.D.The woman knows the professor has run into trouble.

A.The woman knows the professor has been busy.
B.The woman regrets having taken up much of the professor’s time.
C.The woman has trouble getting along with the professor.
D.The woman knows the professor has run into trouble.

单项选择题A.They lifecycle of trees.B.The number of trees.C.The intensity of solar burning.D.The quality of air.

A.They lifecycle of trees.
B.The number of trees.
C.The intensity of solar burning.
D.The quality of air.