31. 答案：D。表示推测反义问句的形式一般参照时间状语确定。此处隐含的时间状语：(他们肯定)已经(去听报告了)，所以用完成时。

30. 答案：A。no one but…做主语时，谓语动词根据no one确定。

29. 答案：C。前文的might as well表示：还是…的好；不妨…，由此推断后文语气不是很肯定，所以用may。

28. 答案：A。按照……(单位)计算。习惯在表示单位的名词前加the。

27. 答案：D。一个四小时的路程。还可以表达为a four-hour walk。

25. 答案：B。有些邮票属于我，其余是他的(邮票)和她的(邮票)。名词性物主代词。 26. 答案：D。beyond one’s power超出……能力范围。

44. Suddenly, a tall man driving a golden carriage ________ the girl and took her away, ________ into the woods.

　　 A. seizing ..., disappeared

　　 B. seized ..., disappeared

　　 C. seizing…, disappearing

　　 　D. seized ..., disappearing

43.　 ________, I have to put it away and focus my attention on study this week.

　　 A. However the story is amusing

　　 B No matter amusing the story is

　　 C. However amusing the story is

　　 D. No matter how the story is amusing

42. After his journey front abroad, Richard Jones returned home, _____

　　 A. exhausting　　　　　　　 B. exhausted

　　 C. being exhausted　　　　　 　D. having exhausted

41. Along with the letter was his promise ________ he would visit me this coming Christmas.

　　 A. which　 B. that　　 C. what　　 D. whether