. Teenagers are warned to be careful when making friends online, because when you can’t see a person, they could be __________.
China lies ___ the east of Asia and ___ the north of Australia.
—I want to go to the West Lake. But I don’t know the way. —A ___ will help you.
My friend Tim knows my hometown very well because he ___ there many times with me.
After the Asian Games, ___ people came to Guangzhou for a visit during holidays.
—Could you tell me where Jim is? I want to return the bike to him. —He ___ the library. He will be back soon.