40. The definition leaves __________ for disagreement.  
A. a small room            B. much room  
C. room          D. not so big a room
答案：B不可数名词的用法。句中room做“空间，余地”，为不可数名词。A和D中的room是可数名词；C中的great deal应为a great deal of，后接可数名词。

41. By the time you arrive this evening,  __________ for two hours.  
A. I will study              B. I will have been studied  
C. I had studied             D. I will have been studying
答案：B将来完成时，By the time后接一个表示将来时间的词或短语或一个表将来动作的从句时，主句要用将来完成时。

42. I would have joined him in a picnic, but I __________ his company.  
A. will not like            B. don't like  
C. had not liked            D. might not like
答案：B虚拟语气，would have done sth.表与现在事实相反。

43. Let's finish our homework in a few seconds; it's time we __________.  
A. played football          B. will play football  
C. play football            D. are playing football
答案：A虚拟语气的特殊形式，it's time+that+一般过去时。

44. __________ at Harvard, he began again to write his essay.  
A. Busy was as he           B. Busy as was he  
C. Busy as he was           D. As was he busy
答案：C倒装结构，由as引导的让步状语从句置于主句之前时表语要倒装。

45. Pierre often makes himself __________ by gesturing with his hands.  
A. to understand             B. understanding  
C. to be understood          D. understood  
答案：D动词的用法，make himself understood使自己的意思被别人明白。
 
Part III  Identification     
46. [Advertising] gives useful information about [which] [products] [to buying].  
       A                      B             C             D
答案：D应改为to buy，which to buy是动词不定式的疑问式。
 
47. [In Hawaii] people are [friendly] and always [warmly] [welcomed] visitors.    
A               B                 C          D