题目

完形填空It was a busy morning,about 8:30, when an elderly gentleman in his 80s came to the hospital. I heardhim saying to the nurse that he was in a hurry for an appointment(约会) at 9:30. The nurse had him take a 1 in the waiting area, 2 him it would be at least 40 minutes 3 someone would be able to see him. I saw him 4 his watch and decided, since I was 5 busy—my patient didn't 6 at the appointed hour, I would examine hiswound. While taking care of his wound, I asked him if he had another doctor'sappointment. The gentleman said no and told me that he 7 to go to the nursing home to ea因为21= × = × ，所以21的因数有 个．