单项选择题

If you don't know a word, you must ______ the word in a dictionary.

A．look up
B．look down
C．look over
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单项选择题
Help ______ to some fruits, children.
A．you
B．yours
C．yourselves
单项选择题
He ______ living in the country to the city.
A．likes
B．prefers
C．enjoys
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