—I would like you to talk about the Great Wall.—I’m sorry, but _________ Jack _________ I have been there.
Would you like to tell us something about what a doctor’s life ______?
The old man was _______angry _____ a word. He didn’t say anything.
It is such that you muston it.
Middle school students _________ smoke because it is bad for their health.
The old book there ______ some strange pictures in it. Nobody can understand them.