问题描述：
i'm moving to the countryside because the air there is much fresher than { }in the city.
a.ones b.one c.that d.those为什么选择c
cars do cause us some health problems ---in fact far more serious{ }that mobile phones do.
a.one b.ones c.it d.those
为什么选择b 综合分析俩题谢谢
a.ones b.one c.that d.those为什么选择c
cars do cause us some health problems ---in fact far more serious{ }that mobile phones do.
a.one b.ones c.it d.those
为什么选择b 综合分析俩题谢谢
问题解答：
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