The Great Wall travels______ deep valleys, _____ deserts and______ mountains.
A.over; across; through
B.through; across; over
C.across; over; through
D.through; across; across
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B解析试题分析：介词辨析。Through穿过；across从表面横过；over从上方越过；句意：长城穿过深深的峡谷，横过沙漠，越过高山。故B正确。考点：考查介词辨析点评：具体的介词的词义Through穿过；across从表面横过；over从上方越过。也要注意介词与不同的动词的连用和搭配。