"Why did you go to the wrong class, Mr. Wang " "Well, I forget _______ I was supposed to go to."
We held a party on Christmas Eve at a hall _______ with colourful balloons and flowers.
After the heavy snow, many students helped to clear away the snow ______ in our school.
We went through a period_______ communications were very difficult in the countryside.
Professor James will give us a lecture on the Western culture, but when and where _______ yet.
-- I have warned him of the danger but he insisted on going there alone. -- What a _______ boy!