8. We have ________ doors. (已经修理了)

7. We have already _______. (换了新玻璃)

6. They ________ the room. (刚冲出了)

5. They have　 ___________. (到达了机场)

4. It is ____(必要)to get ______(准备)for math exams?

3. It is ___________ be nervous. (不紧张很重要)

2. It　 is _____ (好主意)to listen to ______.(一些音乐)

1. If you exercise every day, your heart ____ be stronger. (将会变得)

10. That happened at the London Zoo.(对画线部分提问)

9. I have just moved into this new house.(改为一般疑问句)