用句中劃線部分詞的反義詞填空，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.
