It is required by law that the children above six years old in our country ________ to school to receive education.

 ——It was the drug，not the disease，that killed the boy.——He would be still alive today if he ________ that drug.

_______ which way to take, the little boy behaved like a real gentleman who comforted his sister from time to time.

—Amazing! You        wear slippers at work.—Don’t you know it’s a fashion?

           for the timely investment from the general public, our company would not be developing so fast as it is.