单项选择题

In the opening paragraph, the author introduces his topic by ______.

A．posing a contrast
B．justifying an assumption
C．making a comparison
D．explaining a phenomenon
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单项选择题
Boarding schools are losing their popularity among pupils because ______.
A．Most pupils can not afford the high fees to study there
B．children tend to hurt themselves in the school
C．children in the school would fall addicted to drugs
D．in the boarding school children would stay far away from their parents' eyes
单项选择题
The statement The decline leveled off four years ago (Last line, paragraph 2) implies that ______.
A．the number of children at boarding schools dropped sharply tour years ago
B．many boarding schools had to close four years ago
C．the changing of the number of the pupils in the boarding school became level after a sharp declining four years ago
D．more and more parents tended to send their children to some private school other than the boarding ones
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