74. This old man had to make his living by sell newspapers.
A B C D ( ) _____
73. They have been marry for about 20 years.
A B C D ( ) _________
72. You’d better to work out this maths problem yourself.
A B C D ( ) __________
71.The boy spent three hours finish his homework.
A B C D ( ) ________
70. Tom is a kind boy. He is always ___________(friend) to others.
(C) 下列各句划线部分中有一处错误，请找出错误选项，并在横线上写出正确形式。
69. I think it___________(danger) for children to be close to wild animals.
68. When you have difficulty___________(solve) the problems, please ask me for help.
67. The party yesterday was a big __________(succeed). Everyone had a good time.
66. The robot will __________(design) to do most of housework for human in the near future.
65. Scientists are working hard to find out a way to cure this special disease caused by an unknown________(病毒).
(B) 根据句子意思，用括号中所给词的适当形式填空。