单项选择题

Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．The quantity of single parent family in America.
B．The push of Maria Brennan.
C．The September 11 attack.
D．The requirements of four schools.
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单项选择题
A．He is not interested in the competition.B．He doesn’t know if the super girl was successful.C．He can’t follow the state competition.D．He thinks the super girl of last week was eliminated.
A．He is not interested in the competition.
B．He doesn’t know if the super girl was successful.
C．He can’t follow the state competition.
D．He thinks the super girl of last week was eliminated.
单项选择题
The researchers are now trying to figure out ______.
A．whether observed antibodies can block the infection of HIV
B．whether the combination of vaccines stimulates new molecules
C．whether the combination of vaccines can work well
D．whether the combination of vaccines could be tested in normal people
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