单项选择题

Researchers of New Zealand will raise a flock of sheep through genetic engineering in order to （）

A. study the symptoms of a mental disease
B. cure a heart disease
C. make a fortune
D. study the exclusive sheep

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单项选择题
What is the girl（）

A. A teacher.
B. A salesgirl.
C. A student.
D. A hostess.
单项选择题
The writer takes an example to show he is （）the way the word is used.

A. happy with
B. strange to
C. worried about
D. careful with
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