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 thousan
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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
Who gave New York its nickname
A．Artists.
B．Musicians.
C．Grocers.
D．Tour guides.
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