Passage Two Questions 29 to 31 are based on the passage you have just heard.
A. He had helped Booth murder Lincoln. B. He had made a diagnostic error. C. He had concealed the facts. D. He had given Booth help in some way.
单项选择题A. It is weird. B. It is convenient.C. It is comfortable. D. It is exhausting.
单项选择题A. He had better assess his own ability.B. He should try to solve some easier problems now.C. He must study hard to solve the difficult problems.D. He should find some more complicated problems to solve.