单项选择题

Where did the conversation most probably take place

A．In a library.
B．In a classroom.
C．In a bookstore.
D．In a hotel.
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填空题
A．nationalB．publicC．commercialD．local
单项选择题
The author’’s purpose in writing the passage is to______.
A．indicate the way genetic testing works
B．show the power of one’’s genetic makeup
C．introduce genetic testing and its function
D．reveal the influence of environment on genes
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