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. [ ]