People sell their products ____advertisement in the newspaper.
26. The craze fans ________ outside the hall, and they will wait till the movie star comes.
25. Her grandmother has taught in this school _______ she became a school teacher.
24. Is this the hotel ________ you stayed the first time you were here?
23. Please ask ________ not to skate on the thin ice. It’s very dangerous.
22. Jack, you’ve done your homework, ________ you?