—There is too much ________ on the floor. Why did you make it much too ________?—Sorry, Miss Gao. I will clean it at once. A. dirty, dirtB. dirt, dirtyC. dirt, dirt
—Dad, why must I stop ______ computer games?—For your health, my boy.
Here is the book. First _________ it and then tell me what you think of it.
Is this a photo of your daughter? She looks ____ in the pink dress!
—Not only the young but also the old are getting interested _____ WeChat (微信).—They can communicate more freely.
____of the land in that district____ covered with trees and grass.