Many websites have been to help people study foreign languages.
A. set up
B. set off
C. set down
D. set out
网友回答
(答案→)A. set up
B. set off
C. set down
D. set out
解析：考查词组辨析：A. set up建立，B. set off出发，引发，引爆，C. set down记下，D. set out开始，动身，句意：我的新网址已经建立帮助人们学习外语。选A。