问题
选择题
The Great Wall travel _______deep valleys, ________deserts and ________mountains.
A．over, across, through
B．through, over, across
C．across, through, over
D．through, across, over
答案
答案：D
题目分析:考查介词用法。through指穿过某一空间；across指从表面穿过；over强调跨过某一高度，由此可知答案选D。句意：长城蜿蜒曲折，穿越深谷，穿过沙漠，跨过高山。