完成句子。
1. The ________________________(develop) of science has changed our life a lot.
2. Listening to a talk is ___________________ (please). We all feel bored.
3. Most of the visitors got lost in the ___________________(beautiful) of Tianmu Lake.
4. It’s __________________(use) to talk so 
much if you don’t match your words with actions.
5. All of us were excited at those ________________ (perform) performance.
6. Thousands of_____________________(tour) come to visit our city every day.
7. It’s his _________________(five) day in Guiling.
8. You are great. You have worked out the problem _________________.(success)
9. It’s over three years since I ________________(come) back form Beijing.