We set off _______ the Three Gorges _______ abeautiful afternoon from Fu Ling.

The students _______ busily when Miss Brown went to get a book she _______ in the office

He is such a good salesman that he finally managed to make the customers________of the qualityof the car [ ]

The Internet is a wonderful discovery,________of great significance to people’s lives

You are thirsty, aren’t you? _____he get you some coffee?