【高一英语】两道完形填空It was the last day of the final examination in a large eastern university. On the steps of one building, a group of students were talking about the exam that was going to begin in a few minutes. On their faces was

【高一英语】两道完形填空It was the last day of the final examination in a large eastern university. On the steps of one building, a group of students were talking about the exam that was going to begin in a few minutes. On their faces was
【高一英语】两道完形填空
It was the last day of the final examination in a large eastern university. On the steps of one building, a group of students were talking about the exam that was going to begin in a few minutes. On their faces was confidence. This was their last exam— then on to graduation and jobs.
　　Some talked of jobs they already had; others talked of jobs they would get. With the certainty of four years of college, they felt ready and able to take control of the world.
　　The coming exam, they knew, would be an easy task. The professor had said they could bring any books or notes they wanted, requesting only that they did not talk to each other during the test.
　　Happily they entered the classroom. The professor passed out the papers. And smiles appeared on the students' faces as they found there were only five questions.
　　Three hours had passed ___7___ the professor began to collect papers. The students no longer looked confident. On their faces was a frightened expression. Papers in hand, no one spoke as the professor faced the class.
　　He looked at the worried faces before him, and then asked, "How many completed all five questions?" Not a hand was raised.
　　"How many answered four?" Still no hands.
　　"Three? Two?" The students moved restlessly in their seats.
　　"One, then? Certainly somebody finished one ."But the class remained silent.
　　The professor put down the papers. "That is exactly what I expected ," he said. "I just want you to know that, although you have completed four years of study, there are still many things about the subject you don't know. These questions you couldn't answer are relatively common in everyday ___12___. " Then ,smiling, he added, "You will all pass this course, but remember - even though you are now college graduates, your education had just begun ."
　　The years have weakened the name of the professor, but not the lessons he taught.
　　

(C)【 7.】 A.then B.as C.before D.after
(C)【12.】 A. job B.class C.practice D. study


我自己选的是B和D 为什么不对呢?

【高一英语】两道完形填空It was the last day of the final examination in a large eastern university. On the steps of one building, a group of students were talking about the exam that was going to begin in a few minutes. On their faces was
7.前后两个动词有明确的先后顺序,先发生的用过去完成时态,这是过去完成时态的用法,所有had passed 在began 之前,所以用before.
12.通读全文,是教授问好多同学完成了5个问题,这是考试结束后,他告诉同学们,这些你们没有回答的问题是和我们每天训练的相关的.study太过广泛了.我这么认为,所以选择C

关于7，had pass是长动作，as是连接两个瞬间动词的，此处不可以用as。另外根据句意可知before和after中应用before。study是带有研究，钻研的意思，日常生活中的训练，不能说是钻研。