Mr Li is a good teacher.He always helps us ___ we're in trouble.A.ifB.when觉得应该选B,但A为什么不对呢?

A：B:Mr Li is a teacher. Mr ,li,is,good ,old ,people,with,连词成句 mr li is a friend of _ Do you know__ is our English teacher?--Mr Li teaches us English.He is a good teacher. Mr.Wang ,this is Xiao li.后一句(具体要看下题)单选:_Mr.Wang ,this is Xiao li.____.A.Xiao Li,this is Mr.wang.B.Thank you C.Good Mr Li is a policeman.(同义句） Mr Li _____ _____ a policeman. A:This is （ ） teacher,Mr.Li B：Mr/Li,this（ ）my mom Mr Li is a postman.He woks in a( ) 英语翻译Mr li is ________ a helpful teacher ____________________________him Mr Li is a teacher .He __(teach) us art Mr.Li is standing in front of a car Mr Li is a worker.改为否定句 Mr Li is a policeman的同义句是什么 Mr Li is a policeman的同义句是什么 翻译家 Mr Li’s family is a happy family. Mr Li is a teacher.Mrs Li is a teacher,too.（合成一句）Mr Li and Mrs Li ___ ____ ___. Mr Li is a good teacher.He always helps us ___ we're in trouble.A.ifB.when觉得应该选B,但A为什么不对呢? ( )chinese teacher is mr li