单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．To pay a refundable deposit.
B．To provide their own furnishings.
C．To sign a housing contract.
D．To cook by themselves.
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填空题
While integrase deletes an immune cell’s genetic material and replaces it with its own, it acts like ______ in a word processor.
单项选择题
A．He helped establish the city’s first university.B．He helped establish the city’s first post office.C．He helped establish the city’s first library.D．He helped open a hospital.
A．He helped establish the city’s first university.
B．He helped establish the city’s first post office.
C．He helped establish the city’s first library.
D．He helped open a hospital.
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