Mary _has___ __been__in China since three years ago .
玛丽在中国待了两年了.现在完成时表示从过去延续到现在.
Mary is （has been）in China since three years ago .
Mary ____ ____in China since three years ago .填什么
Mary ____ ____in China since three years ago .填什么
英语人气：853 ℃时间：2020-02-03 02:23:59
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