Living in the central Australian desert has its problems, _____ obtaining water is not
the least.

A. of which
B. for what
C. as
D. whose
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科目：高中英語 來源：0123 期中題 題型：單選題

Living in the central Australian desert has its problems, _____ obtaining water is not
the least.
[     ]
A. of which
B. for what
C. as
D. whose

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