Several traffic accidents have happened recently.If drivers are careful enough,most accidents .
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.