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根据情景，从
--Are you ______?
--Yes, I am.
A. America B. American C. a American
I am going to Tiantan with my grandpa.
A. visiting B. visit C. visits
Guess the meaning of the underlined word
I don't have any family. I am an orphan.
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用适当的介词填空：
I am at school 7 a.m. 5 p.m..
I am going to America.
A. visit B. visiting C. visits
