用句中划线部分词的反义词填空，使句意完整。

1. The bag is too heavy. You are not tall. You should carry the_____one.

2. His coat is_____. His mother wants to buy him a new one.

3. He says, "English is very interesting, but maths is_____."

4. My ruler is long. But his ruler is_____.

5. His father is very old. But he likes to play with _____ people.