四、用所给单词的正确形式填空（共10小题，计10分）
61. I live on the (twenty) floor in that tall building.
62. My mother is a nurse. (look) after patients is her job.
63. I feel (hope). Can you give me any ideas?
64. She is one of the (care) girls in her class. She seldom makes mistakes in exams.
