I was doing my homework _______ a dog came in.
—I could believe my eyes when I came to Nanjing last year. —Yes. Great changes have taken place in the past few years.
When Nanjing Metro Line 3 came into use, it became much to travel from the north of the Changjiang River to the city centre.
— is the number of the students in your school, Wu Dong? —It’s more than 1,000, but I’m not sure about it.
Customs change from country to country. Some customs in China are quite different fromin Western countries.
—Excuse me, Liu Ming. Could you tell me what a UFO is like? —Sorry. Perhaps really knows whether there is a UFO in the world.