I. 1. never

   2. always

   3. sometimes

   4. How often

II. 1. exercise; exercises

    2. were

    3. spending; times

    4. paid

    5. twice

III. 1. so fast that

     2. don’t have to

     3. stayed up

     4. Although

     5. woke me up

     6. not good for

     7. point out

IV. One possible version:

My Habits

Habits play an important role in our life. Everybody has both good habits and bad ones. So do I.

I have many good habits. I always read English books after supper and often help my parents with housework as possible as I can. Reading brings me fun and opens my mind. Doing housework makes our house tidy and improves the relationship between my parents and me.

As for bad habits, I usually eat junk food so I’m putting on weight. In order to be in good health, I decide to change my bad habits. First, I’ll try to eat more vegetables and fruits. Second, I will do more sports, like playing badminton. Sports can make me stronger and healthier.

I will develop my good habits and correct bad ones.