21. A. struggling B. improving C. working D. complaining

　　22. A. put up B. prepare for C. worry about D. give up

　　23. A. committee B. newspaper C. radio D. team

　　24. A. enthusiastic B. artistic C. sympathetic D. realistic

　　25. A. widely B. weakly C. excitedly D. brightly

　　26. A. similar B. ordinary C. different D. familiar

　　27. A. physics B. history C. English D. math

　　28. A. pleasure B. hope C. trouble D. sorrow

　　29. A. swim B. try C. ask D. escape

　　30. A. in return for B. in case of C. in terms of D. instead of