单项选择题

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

A. for which
B. to which
C. of which
D. in which

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All （）is a steady supply of water to the farmland.

A. which needs
B. that is needed
C. the thing is needed
D. need
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Which sport has the most expenses （）training equipment, players’ personal equipment and uniforms

A. in place of    
B. in terms of   
C. by means of   
D. by way of
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