单选题
5.
Living in the central Australian desert has its problems,______obtaining water is not the least.
A、
as
B、
whose
C、
for which
D、
of which
【正确答案】
D
【答案解析】
which为关系代词，代替前面的先行词problem；of是后面从句中the least of要求的，of提到了前面，按正常语序从句应是obtaining water is not the least of its problems。
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