He thinks _____ history about Chinese is very important.
—Dad!Can you tell me ____ to the amusement park?—The day after tomorrow.
—Do you know ____ in America?—Sure. It's the third Sunday of June.(2014,云南)
—I don't know ____ or not.—Neither do I.You may ask his teacher.
I didn't know ____.
—What did your father say?—He asked us ____.