（用括号中所给单词的适当形式完成下列句子。每空限填一词）（共8分）
59. It’s important to brush your __________ at least twice a day. (tooth)
60. It is the __________ time Lee has won an Oscar for best director. (two)
61. Why do you think you did so __________ in your test? (bad)
62. My grandma has become very __________ in recent years. (forget)
63. I’m not happy with the __________ of the trip. I think two weeks is long enough. (long)
64. The floods have killed hundreds and made thousands __________. (home)
65. The new programme aims to __________ older people to study at college. (able)
66. Why shouldn’t doctors __________ on their family members? (operation)