高中情态动词-That must be a terrible mistake .-No.I don't think it

高中情态动词-That must be a terrible mistake .-No.I don't think it Q:that must be a mistake 为什么回答是NO,it can't be.而不是no,it can't "that must be a mistake" "no,it______a mistake" That must be a mistake.No,it____a mistake.A.must not be B.ne 高中情态动词题1,your sister must be at home,_______she?A,isn't Bdoe That must be a mistake,___ it?A mustn't B can't C isn't 选什么, I don't think it would be safe ( ) a kite I made a terrible mistake.I don't know what to do.who can te It's a mistake Don't be grieved I don't think it will be. "That's must be a mistike" "No,it can't be a mistike."中为什么不能 I a mistake.please don't be angry with m