21. Doctors have been researching effect stand-up and other forms of comedy have on us.
A. which B. what C. whatever D. whichever
22. I remember sometimes in， but I was still very happy. a rush to grow up and be independent
A. to feel B. felt C. being feeling D. feeling
23. The young man is quite brave and strong. He is always ready to heavy responsibilities and turn down the light ones.
A. take off B. take down
C. take on D. take over
24. I am sure the exhibition you have you an idea of the happy lifestyle of the people in the faraway country.
A. an interest in giving B. interested in gives
C. an interest in gives D. been interested in giving
25. — Is Alice still performing？
— I’m afraid not. She is said the stage already as she has gone abroad for further study.
