看图填空。

1. What classes do you have on Mondays?

    I have English, art, math and _____________.

2. What classes do you _____________ on Tuesdays?

    I have Chinese, _____________, English and math.

3. What classes do you have _____________ Wednesdays?

    I have math, Chinese, music and _____________.

4. What classes do you have on _____________?

    I have Chinese, computer, Moral Education and _____________.

5. _____________ classes do you have on Fridays?

    I have math, Social Studies, English and _____________. I like Fridays.

实施奖励的原则是什么？