问题
选择题
People have lots of problems living in the central Australian desert, ____ the lack of water is the most serious one.
A．of which
B．which
C．for which
D．where
答案
答案：A
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People have lots of problems living in the central Australian desert, ____ the lack of water is the most serious one.
A．of which
B．which
C．for which
D．where
答案：A
