单项选择题

Passage One Questions 11 to 13 are based on the passage you have just heard.

A．Because they were once overlooked by the team at Whitehead Institute.
B．Because they are composed by tiny, single-stranded pieces of RNA.
C．Because they were not found by the researchers until 2000.
D．Because they may exert great influence to human life’s functions.
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S3
单项选择题
A．He may convert it and use it as a restaurant.B．He may pull it down and build a new restaurant.C．He may rent it out for use as a restaurant.D．He may sell it to the owner of a restaurant.
A．He may convert it and use it as a restaurant.
B．He may pull it down and build a new restaurant.
C．He may rent it out for use as a restaurant.
D．He may sell it to the owner of a restaurant.
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