48. When he came in, I stopped ____ to talk to him. A. to work B. for work C. for working D. working ...

41. Jim’s close _______ to his brother made people mistake them for one another. A. alike B. likely C. likeness D. dislike ...

37. According to the contract he had signed, John had(an) _______ to pay the bank on the first day of every month. A. obligation B. duty C. responsibility D. ethics ...

32. You do not have to go to the lecture, because the attendance is ________. A. elective B. optional C. choice D. representative ...

28. As you are sixty-three years old, you are _______ for this job. A. improper B. inconvenient C. mistaken D. unsuitable ...

20. It has been suggested that we ___________ the authorities. A. not wait for B. would not wait for C. will not wait for D. must not wait for ...

16. _________ of this country' s abundance in natural resources. A. Little we know B. Little did we know C. Little we did know D. Little we had know ...

12. Beingpupil withlow IQ, Henry could _________ little of what the teacher was saying in class. A. take on B. take in C. take up D. take for ...

8. The husband and wife run their own business near the entrance to the park. They do a(n) _____trade in souvenirs and gifts. A. lovely B. lively C. active D. busy ...

4. I'm very busy, so I can't _______that problem with you for the moment. A. discuss B. quarrel C. answer D. explain ...