单项选择题

A. To cancel his trip.
B. To go to bed early.
C. To catch a later flight.
D. To ask for a wake up call.
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单项选择题
A. To check the accuracy of scales.B. To calculate the density of other metals.C. To observe changes in the atmosphere.D. To measure amounts of rain fall.

A. To check the accuracy of scales.
B. To calculate the density of other metals.
C. To observe changes in the atmosphere.
D. To measure amounts of rain fall.
单项选择题
A. She hasn’t been getting adequate grades.B. She hasn’t been attending class every day.C. She has been coming to school much too early.D. She has been overloading herself With homework.

A. She hasn’t been getting adequate grades.
B. She hasn’t been attending class every day.
C. She has been coming to school much too early.
D. She has been overloading herself With homework.
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