income worry is _______ rather common problem of the aged, loneliness is another problem that _______ aged parents may face.

______ does your father go to work—He rides his bike.

You’d better_________ his name, address and telephone number in your notebook before you forget them.

______ those students Chinese, do you have to speak their language very often? — No, they learn most when the class is taught in a foreign language. [ ]

The broken window was the that the house had been broken into.