A spaceship flies at about eleven kilometers _______ second.
Lots of people like to take a walk on Nanjing City Wall since it .
—Amy, I think you have to return the book to the library today.—Why? I it for only one week.
—The air in Nanjing was much better during the Spring Festival because people were not allowed to let off firecrackers.—I agree. Everyone should do what he can the environment.
weather it has been these days! One day is quite rainy, another day is quite windy.
In order to improve our spoken English, more should be paid to our pronunciation.