The Tibetans have lived in the Himalayas for centuries and have adjusted to the conditions .
A. at such great height
B. at such a great height
C. on such great height
D. on such a great height
网友回答
A. at such great height
(答案→)B. at such a great height
C. on such great height
D. on such a great height
解析：考查介词短语，at such a great height“在这样的高度”，介词是at，要不定冠词，句意是：西藏人在喜马拉雅生活了几个世纪已经适应了这么高海拔的条件。选B。