Lily, how do you practice your listening skills—In many ways. Usually I practice them by _____ tapes.

5. It’s said that next month another 20,000 students will be ____ to colleges and universities in our province.

Once he makes a promise, he will ______ it.

Only after liberation（解放）to be treated as human beings.

Most disaster experts believe there is the potential ______ things could get a lot worse