—Have you figured out how much the tuition is in American universities?—$19 000 or ________ like that.

I have bought a good book, ______ that will surely interest ______ of the students．

Many people complained about the stones lying on a road, but _______ did anything about getting the stones out of the way.

Those who smoke heavily should remind ________ of health, the bad smell and the feelings of other people.

We must ______ known to all that smoking is harmful to heart.