问题补充:
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:
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。