Jim isn’t in the classroom. Where is he？- He _____ to the teacher’s office.
―Who is making so much noise in the garden? ―___________ the children.
Now the air in our town is __ than before. Yes. Something must be done to stop the pollution.
Some little boys have difficulty ______their hearts into the lesson for a long time.
Sandy wants to buy the same football cards _____ his brother did. [ ]