Manycountriesfacesomeseriousproblems
单项选择题 Many countries face some serious problems of land use,（）result from population growth and the demands of modem technological living.
A.which most?
B.most of which?
C.most which?
D.of most which
正确答案：B
答案解析:这是由which引导的非限制性定语从句。
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相关知识：第二章、语法与词汇
