单项选择题

A．Average tuition costs increased by 9 percent.
B．Average tuition costs increased by 15 percent.
C．Average tuition costs increased by 90 percent.
D．Average tuition costs increased by 150 percent.
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单项选择题
A．In the 16th century.B．In the 17th century.C．In the 18th century.D．During the Middle-ages.
A．In the 16th century.
B．In the 17th century.
C．In the 18th century.
D．During the Middle-ages.
单项选择题
A．She was understanding.B．She was annoyed.C．She was apologetic.D．She was careless.
A．She was understanding.
B．She was annoyed.
C．She was apologetic.
D．She was careless.
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