你想向别人介绍你的朋友John,应该说__________A、Hello! I’m John . B、This is John .
Most of the children enjoy ______ computer games.
I'm hungry. Please bring me some ______.
The Whites _____ many places of interest since they came to China.
- What did you do last night? -- I did my homework and _____ TV.
The doctor often tells him ____ more exercise.