一.用所给词的适当形式填空.(20分) 1. Doing morning ________(exercise) is good for our health. 2. _______(brush) teeth twice a day is a good habit. 3. Going to school without________(have) breakfast is bad for you. 4. Go to bed early, you’ll feel________(good) soon. 5. Walking is good________(exercise). 6. Han Mei’s father________(watch) TV very late every night. 7. _______(learn) English is very useful. 8. _______(not walk) on the lawn. 9. You must not________(throw) litter about. 10. Food ______(give) us energy.