Pandas are rare animals close to ___________. They have now been listed among the world’s most endangered wildlife animals.

Our teacher said that light______ faster than sound.

John, this watch is mine. How did you get it—This morning I found it under my desk, so I ______it_______.

Most disaster experts believe there is the potential______ things could get a lot worse.

The doctor advised the patient to give up smoking ______ his own health.[ ]