The boy enjoys ________ football after school. It makes him ________ happy.

Each year __________ fishes are killed by the polluted water and many people are made sick by thepolluted air .—-So we should do something to stop it .

___________ is a fact that English is being accepted as an international language.[ ]

We must behave ____ at a formal table

This is the place Lu Xun has lived in.