单项选择题

The fleet operate on an average of______ flights per day.

A．50
B．100
C．150
D．200
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单项选择题
______ will benefit from the 35 million-dollar program.
A．Ethnic minorities
B．Lower-income families
C．Former college students
D．African American families
单项选择题
According to the schedule, the students will take the trip for ______ hours.
A．6
B．7
C．8
D．9
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