【正文】
Unit 8 It must belong to Carla Section B What happened to them? It ______ be a good thing. Because they look sad. It ________________ be an accident. Because they are crying. It ________ be a traffic accident. Because we can see some traffic policemen. might/could can’t must The man is running. Why the man is running? A UFO is landing. The alien is chasing the man. v. 追逐 。 追趕 chase An alien es out 1a