单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. To check the accuracy of scale.
B. To calculate the density of other metal.
C. To observe changes in the atmosphere.
D. To measure amounts of rainfall.
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单项选择题
A. He’s studying for a test.B. He lost his note.C. He missed the class.D. He’s doing research.

A. He’s studying for a test.
B. He lost his note.
C. He missed the class.
D. He’s doing research.
单项选择题
Gabrielle Melchionda （）.

A. did not realize that the insurance company will compensate her loss in the fire
B. realized the real pain for her loss in the fire when the fire broke out
C. had her company insured against business-interruption
D. was very sorrowful when her beauty company caught fire
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