根据句意，用括号中所给单词的正确形式填空。
68. The boy is very rude so he is _________ (popular) with his classmates.
69. The brave boy was in hospital and many ________ (visit) came to see him.
70. The father makes his son ________ (clean) his own bedroom every day.
71. When autumn comes, ________ (leaf) begin to fall off the tree.
72. It’s raining very hard so I decide _________ (not go) out.
73. It’s necessary for us _________ (keep) the classroom clean.
74. There was a lot of traffic on the way, but ________ (lucky), we didn’t miss the film.
75. Yesterday morning, Zhang Ming was late for class because of ________ (get) up late.