21. I am proud that I am able to help so many people.

　 I am proud _______　 ________　 ________　 ________help so many people.

20. He used to be very kind to me. (改为一般疑问句)

　 ________ he ________ ________ very kind to me?

19. Everything seems to be endless.

　 Everything ________　 ________ .

18. Luckily, I have been chosen as the host of the show.

　 Luckily, I have been chosen _____　 ______　 ________　 _______of the show.

17. Lily is a very hard-working girl. She can do well in English.

　 Lily is ________ ________ ________ girl that she can do well in English.

16. Johnny is so weak that he can’t walk any further.

　 Johnny is ________　 ________　 ________ 　________　 any further.

15. A friend in need is a friend _____________(真正的).

14. The ORBIS doctors perform ____________(operate) on the patients on the plane.

13. Amy and her classmates carry on _______(practise) dancing for the performance.

12. He isn’t used to _______(drink) orange juice in the morning.