Question

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

Answer 1

B

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。
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。