3. How lovely your smile is !
4. My friend Nhien sent me a letter today
6. He is tall enough to reach the top of the bookself
7. The test isn't easy enough for me to do it
8. Our charaters are quite different
10. I spend an hour watching TV every day

XI.
1. What does she look like ?
2. She isn't as outgoing as Mai
3. They perfer outside to the classroom
4. I spend most of time with Hoa
5. She is lucky enough to have a lot of friends
6. The sun rises in the east

2. She isn't old enough to ride a motorbike
3. The boy isn't old enough to understand this
4. This book isn't small enough for you to put in it your pocket
5. The weather isn't warm enough for us to go swimming
​6. I'm so lucky enough to have many good friends
7. This exercise isn't easy enough for me to do
8. It is such an interesting book that I read it twice
9. The water is so cold that you can't go swimming today