---Please print this article on both sides of the paper.---_________.
By the year 2015, all of China's museums will be free to enter. We_______visit anymuseum without paying. A. can b. need C. must D. should
—Which one do you want to buy, an iPod touch 4, an iPad 3 or an iPhone 5? —______. They are too expensive.
—Nancy, I bought you a new car, an Audi A8. —Thank you, dear. It's_______ what I want.
Tom didn't go to school_______ this morning because he overslept.
Don't _________too late, or you'll be tired during daytime.