单项选择题

To know how to ______ is much more important than to learn facts

A．study science
B．study
C．study facts
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单项选择题
One night Mr. Brown can't come into his house because he doesn't find his key.
A．Right
B．Wrong
C．Doesn't say
单项选择题
Mr. Brown often comes back home after his wife and the child are asleep.
A．Right
B．Wrong
C．Doesn't say
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