He had to see the doctor by h because his parents weren't at home.
Simon, let's meet (在……外面)the theatre at 2 o'clock.
The (礼貌的)you are, the more others will like you.
Being healthy means keeping everything (好)balanced.
Cooking is one of David's (爱好).
Guangzhou, a modern and developed city, is in the (south)part of China.