As we’re students, we __________ obey the school rules.

The meeting ___________ because of the smog in Northern China last week.— Oh, it’s too bad! We should take action to improve the air quality.

Don’t play soccer in the street. — Sorry, I do that again.

Mom, can you at 8:00tomorrow morning.

Where is your mother?— She _______ to Sichuan on business. She has ______ there four times recently.