I konw he is a teacher who is very helpful to us when we hav

I konw he is a teacher who is very helpful to us when we hav We all think that the book is very helpful to us.为什么是helpful Our teacher's advice is very _(very usefuland helpful) to us he is very ( ) me .A helpful to B helping C helpful of The rich is very helpful to us哪里错 A person’s is very important to me when I decide who I want Our teacher is very -----(friend) to us. Yes,so i must go to see[the]dentist.He is very helpful,you k He is one of the students who（ ）invited to the meeting.A hav -who is the man?-oh,he is the teacher ( ) gave us a speech y 单项选择：The man is very poor,he needs _____.A.to help B.helpful 1.Mary is very helpful.I like to study with_____ A,she B,her