试题与答案

His backache is only _________ for not w

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题型：选择题

题目：

His backache is only _________ for not watering the flowers.[ ]

A. a reason        

B. a cause      

C. an excuse      

D. reasons

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

考点：不定冠词可数名词及其单复数
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题型：单项选择题

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A．increases in direct proportion to number of people

B．decreases in inverse proportion to number of people

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