Mrs Brown shouted at Sam_____(throw) the litter into the was

Mrs Brown shouted at Sam ____ the litter into the waste bin don't drop litter()Throw it into the dustbin() Don’t dorp litter ____.Throw it into the dustbin.A.carefully throw the hat into mrs brown ( )the flowers What was the matter with Mrs Brown?中文 Mrs Brown stays at home.She does all the ____ 阅读短文并选择It is Saturday.The Brown are at home.Mrs Brown is in 请问Do not throw any litter（ ） the river. 3.Waste paper ________________ (should throw) in the litter throw the ball into the court 是什么意思? Mrs.Brown usually stays at home in the morning.把 at 去除正确吗?