40 kilometers Chengdu lies a town, suffered great losses in the earthquake, but is now on the road to recovering.
A. west of; which
B. on the west in; where
C. west of; where
D. on the west of; which
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(答案→)A. west of; which
B. on the west in; where
C. west of; where
D. on the west of; which
解析：考查方位词的用法和定语从句。第一空前面前面已经有了具体的数字，故使用方位副词。如果使用介词短语，前面就不需要数词。第二空是非限制性定语从句，Which指代先行词a town在句中做主语。句意：在成都西面40公里，有一座城市，在地震里遭受了巨大的损失。现在正在在恢复中。故A正确。