题目内容
－Where_____they from?
－They＇re from China.
A. is B. am C. are
C
解析试题分析：句意：他们来自哪里？他们来自中国。be from来自……，在变问句时要把系动词提前到主语的前面。主语是第三人称单数系动词用is,主语是I 系动词用am,主语是复数，系动词用are，因为主要是复数，故选C。
考点：考查系动词的用法。
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