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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参考答案

A。在澳大利亚中部的沙漠居住有很多问题，不单单是取水难。
考查定语从句。逗号后为非限定性定语从句，又有“其中”之意，所以ofwhich最为合适。

1 It is better to die on one's feet than ________

A．living on one's knees

B．live on one's knees

C．on one's knees

D．to live on one's knees

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2 They ________to enter the building by the back door; however, the back door was locked．

A．weren't supposed

B．wouldn't be supposed

C．were supposed

D．would be supposed

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3 There was a ．knock at the door．It was the second time someone ________me that evening．

A．had interruped

B．would have interrupted

C．to have interrupted

D．to interrupt

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