When ______ help, one often says “Thank you” or “I
When ______ help, one often says “Thank you” or “It’s kind of you”. A. offering B. to offer C. to be offered D offered C和D有什么区别，分别怎样用，请详细讲解
答：从意思看是被帮助的人,首先要的是被动的,排除A,B C.to表目的,结构也不对 所以选D When后面省略了one is详情>>
答：B 被动语态，be found to do. A中的made与found均为过去分词，冲突！详情>>
问：hArd work 和hArd--working有什么区别
答：一个是名词 一个是形容词撒详情>>
