Through so much trouble，he learned ________ everyone needed friendship and ________self confidence is important.

Jim, who taught ________Chinese before you came to school?—Nobody. I learned it by _______.

Some people nearby houses came out to clean up the city parks.[ ]

I am gaining weight. I need to see a doctor.— But I think you eat too much. ___________.

Do you take exercise every day? —-Yes. I always thirty minutes after supper.