单项选择题

If you don't know how to read or use a word, you'd better ______ in a dictionary.

A．look it for
B．look up it
C．look it up
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单项选择题
I am ______ to hear your good news.
A．wrong
B．good
C．glad
单项选择题
Linda's been to Canada, ______ she
A．isn't
B．has
C．hasn't
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