问题
选择题
The Great Wall winds its way from west to east, _______ deserts, _______mountains and ________valleys, until at last it reaches the sea.
A．across; through; over
B．through; on; across
C．across; along; up
D．across; over; through
答案
D.
题目分析：长城蜿蜒东下，过荒漠、越丛岭、穿山峡。从表面经过：across. 翻越：over. 从里面穿过：through. 故答案为D.