Miss Gu is teacher. She teaches Chinese.A. them; themB. their; theirC. them; theirD. the

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A. them; them
B. their; their
C. them; their
(答案→)D. their; them
解析：their形容词性物主代词，他们的；them人称代词宾格，他们。句意：顾老师是我们的老师。他叫我们语文。结合语境可知前文为形容词性物主代词做定语，下文为人称代词宾格做动词宾语。故选D。