摘要：are,am 和第二人称代词you一起使用的是are,而和第一人称单数I一起使用的是am.
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—_______ you from America?
—No. I_______ from England.
A.Are; are B. Are; am C. Is; are D.Do, come
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--Where __________ you last night?
--I _________ at home.
A. are, am B. am, am C. were, was D. were, were
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