单项选择题

The teachers mainly teach ______ in universities.

A．Biology and Mathematics
B．Biology and Physics
C．Mathematics and Physics
D．Physics and Chemistry
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单项选择题
What does the word apple in the phrase the Big Apple mean
A．An instrument.
B．A concert.
C．A theater.
D．A city.
单项选择题
One of the messages the man got was from ______.
A．his mother
B．his father
C．his friends
D．his boss
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