У Джека есть хорошие головоломки
1. A bit older than Gary.
2. Much younger than his father.
3. A bit more expensive.
4. Much better than yesterday.
5. Much hotter than yesterday.
6. Is much better player than me.
Spiders have got eight legs.
Cats have got small hands.
A frog has got big eyes.
Mice have got small eyes.
A panda has got a fat body.
A sheep has got a small nose.
A dog has got a short tail.
Chimps have got big ears.
Самый колючий вид репейника, который когда-либо был (ну или из всех существующих).
Это предложение построено правильно.