题目内容：
A student went to college after41all his school examinations. There he put his name downfor world geography,42after the first day, he did not go to43any more. The teachernoticed that this student was44absent and thought that he had changed to45class. He wasvery46when he saw the boy's name on the list of students47wanted to take the geographyexamination48the end of the year.The teacher had prepared a difficult examination paper, which covered49he had taught,and he was eager to see50this student answered the questions. He expected that his answerwould be very51 ; but when he examined his paper carefully, he found only one small mistakein them.52this surprised him very much, he went through the paper53, but was still notable to find54one mistake, so he sent55the student to question him about his work.
When the student had56the room, the teacher said to him, "I know that you came to my classonly once on the first day and that you have been absent from all the others. Yet I have found onlyone small mistake in your paper.57is that? "
"Oh, I'm sorry about that mistake, sir," answered the student."After the examination, Irealized58! ought to have written. I would not have made that mistake59 I had not beenconfused by your60lecture."
阅读以上短文，回答题。
第41题答案是__________ A．having
B．taking
C．passing
D．failing
参考答案：
答案解析：