问题
连词成句
连词成句。（注意大小写）
1. is, Canada, country, this (.)
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2. do, know, what, you (?)
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3. waterfall, Canada, in, famous, is, Niagara Falls, a (.)
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答案
1. This country is Canada.
2. What do you know?
3. Niagara Falls is a famous waterfall in Canada.