国际顶尖MBA申请交流平台--TOPWAY MBA

标题: 00-05-9 [打印本页]

作者: kenlily 时间: 2005-9-24 09:15 标题: 00-05-9

Drinking water___ excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.

A. containing

B. in which containing

C. contain

D. that contain

Answer is B, but why not A?

作者: kenlily 时间: 2005-10-4 21:09

thanks !!

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