单项选择题

A．to prevent
B．preventing
C．for preventing
D．prevented
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单项选择题
How many ways of finding apartments are mentioned in this talk
A．Three.
B．Two.
C．Five.
D．Four.
单项选择题
What do they decide to do at last
A．To play football.
B．To climb mountains.
C．To sing in a get-together.
D．To have a picnic.
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