That student admitted ____ in the math exam, _____ that he would never do that again in the future.
The reason why we were so late is________
Believe it or not, he’ll cheat if he thinks he can ______ it.
Never form the habit of smoking because it ______ human beings.
—It is rather cold here. Shall we light a fire? —No, we ______because things are easy to catch fire.
It is said that his health ______ by years of hard working.