单项选择题

About ______ cats and dogs are destroyed each year.

A．6 million
B．15 million
C．30 million
D．1 million
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单项选择题
In order to persuade the professor to help her, the woman says that ______
A．she is unusually well prepared
B．she wants to take an easy course
C．she needs additional credits in the subject
D．she wants to read a book in this field
单项选择题
The man has not been able to ______ recently.
A．find his glasses
B．sit up straight
C．get enough rest
D．change his tires
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