The woman boss told the customer that it was none of her business and ordered that he _____ away at once.

A. went　　　　 B. go　　　　　 C. goes　　　　 D. going

If Newton lived today, he would be surprise by what ____ in science and technology.

A. had discovered B. had been discovered C. has discovered D. has been discovered

Perhaps the most interesting person I have ever met in my life is an Italian professor（教授） of philosophy （哲学）who teaches at the University of Pisa. 　1 I last met this man eight years ago, I have not forgotten his 　2 qualities. First of all, I respected his 　3 to teaching. Because his lectures were always well-prepared and clearly delivered（表达）, students crowded（拥挤的） into his classroom. His followers liked the fact that he 　4 what he taught. Furthermore（再则）, he could be counted on to explain his ideas in an 　5 way, introducing such aids（帮助） to 　6 as oil paintings, music, and guest lecturers. Once he 　7 sang a song in class in order to make a point clear. 　8 , I admired the fact that he would talk to students outside the classroom or talk with them 　9 the telephone. Drinking coffee in the café, he would easily make friends with students. Sometimes he would 　10 a student to a game of chess. 　11 , he would join student groups to discuss a variety（种类） of 　12 : agriculture（农业）, diving and mathematics and so on. Many young people visited him in his office for 　13 on their studies; others came to his home for social evenings. Finally, I was 　14 by his lively sense of humor. He believed that no lesson is a success 　15 , during it, the students and the professor 　16 at least one loud 　17 . Through his sense of humor, he made learning more 　18 and more lasting. If it is 　19 that life makes a wise man smile and a foolish man cry, 　20 my friend is indeed a wise man.