.—Why do English people talk so often about the weather when they start a conversation?—Well, it’s probably because the weather is a(n)________ topic.
19. To work at home has been made _____ with the development of the Internet.
18. ------- Could you please tell me more about the city? ------- Sorry, I’m a newcomer. I know nothing else ______ you know now.
17. ________ is expected, according to the on-line survey, is that prices of houses will not go up any longer.
16. The story that follows _____ two famous characters of the Rocky Mountain gold rush days.
15. An awful crash between an express train and a bus _____ , however, occur the other day in Russia. A. does B. did D. has to D. had to