The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Nowadays, use____________of certain waste materials to protect the environment.
He has been heavily _______ to the bank since he bought that big house in Beijing.
---Tom, must you have the light______ all night? It’s really a waste. ---Sorry, I won’t do it again.
You have done wrong to Jack, you should say sorry to him.
“ I ______ asleep all afternoon, so I didn’t hear the phone,” he ____ to me.