-Was the United State of America founded on July 4th, 1776? --You _________ be right but I need to check it in the history textbook anyway.
.His proposal is so idealistic that there are many difficulties in putting it into practice.
As nobody here knows what is wrong with the machine, we send for an engineer to handle the problem.
The Spring Festival, a traditional Chinese festival, is celebrated in Asian countries.
Can you think of some cases people are likely to tell lies?
.—Shall we go out for a walk? —Sorry. I’m too busy to for the moment.