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题目内容
（漯河职业技术学院大学英语1(高起专)）
42. (单选题) The Great Wall was so wide that armies could march ____ it.( )(本题1.0分)
A、 at top of
B、 on top of
C、 at the top of
D、 on the top of
A、 at top of
B、 on top of
C、 at the top of
D、 on the top of
参考答案