Livemocha.com is a free site ______visitors can not just learn various languages

题干

Livemocha.com is a free site ______visitors can not just learn various languages but also chat online.

A．where

B．which

C．that

D．what

上一题下一题 0.64难度单项选择更新时间:2017-02-07 04:28:24

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