—What can we do to________ bird flu from spreading?—Try not to buy or eat chickens that have not been checked.A. prevent B. cause C. discover
I find it very hard the question.
When the teacher came into the classroom, the students .
This room is much _________ than that one.
I had tomy little sister when my mother was not at home.
Elvis Presley has sold more than one records all his life.