Many websites have been _______ to help ...

Many websites have been _______ to help people study foreign languages.

A．set off

B．set up

C．set down

D．set out

B 【解析】试题分析：考查动词短语：A. set off出发，引发，引爆，B. set up建立，C. set down 记下， D. set out出发，句意是：很多网站被建立为了帮助学习外语的人。选B。考点：考查动词短语

考点分析：

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