英语
1.They are carrying out a research ______ the cause of carcer. A on B into 2.be concerned with 和be concerned about 的区别 3.make sure的用法?
第一题应该是A吧
答:1. They are discussing what to go into their newspaper. 2. He hates to listen to...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>>