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
网友回答
A. over, across, through
B. through, over, across
C. across, through, over
(答案→)D. through, across, over
解析：
试题分析: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。