_____ he is very busy, he spends at least two hours every day surfing the Internet in order to find out the latest development in science and technology.
After the long journey, the three of them went back home, _________.
— Are you going to the football game? — No, the tickets are ______expensive for me.
You may use the room as you like ____ you clean it up afterwards.
— I saw a lovely alien(外星人) near the New Bridge Airport last week? — _______ There is no such kind of creature at all.
—What shall I do next? —You’d better finish your chemistry exercises ______ I can take you to the cinema this evening.