单项选择题

How many high school students are presenting science projects in Portland this week

A．One hundred.
B．Several hundred.
C．One thousand.
D．Several thousand.
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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
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.
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