At home, he keeps some pets£¬to which he ______ all his spare time. 
A. spends        B. offers         C. devotes         D. provides 
22. She's tired of acting, and she _______ changing for a new job, but she hasn't made up her mind yet. 
A. had considered                B. has been considering 
C. considered                   D. is going to consider 
23. Michael is ______ because he never takes any exercise.
A. under conditions               B. on no condition   
C. in condition              D. out of condition
24. The flowers ______ my mother, but my sister thought they were for her and took them.
A. were intended for             B. intended for   
C. intended to give               D. intended giving
25. She won a Nobel Prize for her scientific ______.
A. interests                     B. achievements   
C. behavior                     D. observation