I / have / toothache / so / I / have to / see / dentist.

A. Doing exercise regularly helps you stay healthy.

B. Doing exercise regularly help you stay healthy.

C. Do exercise regularly helps you stay healthy.

D. Doing exercise regularly helps you are stay healthy.

A. Eating less sweet food and eat more fruits and vegetables.

B. Eating less sweet food and ate more fruits and vegetables.

C. Eating less sweet food and to eat more fruits and vegetables.

D. Eat less sweet food and more fruits and vegetables.

A. Watch much TV is not good for your eyes.

B. Watching much TV is not good for your eyes.

C. Watch too much TV is not good for your eyes.

D. Watching too much TV is not good for your eyes.

A. Eat healthily is an important part to maintain good health.

B. Eat healthily is an important part to maintain good health.

C. Eating healthily is an important part to maintain good health.

D. Eating healthily is a important part to maintain good health.

A. Drinking lots of water is good for our health.

B. Drink lots of water is good for our health.

C. Drinking a lots of water is good for our health.

D. Drink a lots of water is good for our health.

A. When I was ten, I began to play football.

B. When I was ten, I begin to play football.

C. When I am ten, I began to play football.

D. When I was ten, I began play football.