用所给单词的适当形式填空。

1. American and British children do many after-school ____________ (activity).

2. He has ____________ (few) books than Tom.

3. My life will be a lot ____________ (good) than it is now.

4. This kind of robots can do the simple job again and again and never get ____________ (bore).

5. How will the world be ____________ (difference) in the future?