4. It would be difficult to...

3. I would need help to...

2. If I..., I would be able to...

1. I'm sure I would be able to...

20. ____ than 多于；不仪仅；极其

　　 ☆交际用语☆

19. be different ____ 与……不同

18. prepare ____ 为……做准备

17. ____ times有时

16. translate...____ ……把……译成……

15. let ____ 放出；泄密