问题
选择题
Mary has been away from her hometown three years.
A．for
B．since
C．in
D．on
答案
答案：A
题目分析：句意：玛丽已经离开家乡三年了。三年的时间：for three years , since three years ago.故选A。
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Mary has been away from her hometown three years.
A．for
B．since
C．in
D．on
答案：A
题目分析：句意：玛丽已经离开家乡三年了。三年的时间：for three years , since three years ago.故选A。