. ----Daddy,look! Why______rainbow is like a bow?----Oh,it is apologizing to_______angry sky.
Of all the books on the shelf, is of any use for improving our practical skills of survival in the competitive world.
—How was your recent trip to England?—I’ve never had ______ one before.
When you talk about a person’s _____, you are referring to the country, race, or social class of their parents or ancestors.
In ____ accident _____ knowledge of first aid can make _____ real difference.
In order to continue to live well when we leave school, we must _______ learn some useful skills as well as study in the school.