----Do you know how the accident _______?----Sorry, I don’t know.A. come outB. come into beingC. come about
Did you go _________ on vacation last summer?
All the class keep quiet _________ the class begins.
Many people go to Tian’anmen Square to watch the national _________ rise on National Day.
We will have a week _________ next month. We’re going to take a vacation.
My uncle bought me a book for my ___________birthday.