32. you cannot be _b_ careful when you drive a car.
a very b too c so d enough
cannot too 在…也不为过，越…越好。
34. every man in this country has the right to live where he wants to _a_ the color of his skin. [regardless of 不管，不顾]
a regardless of b in the light of c by virtue of d with the exception of
35. housewives who do not go out to work feel they are not working to their full _b_.
a strength b capacity c length d possibility
strength n. 力量，体力，实力; capacity n. 才能，才智（能力方面）。
38. the old couple decided to _c_ a boy and a girl though they had three of their own.
a adapt b bring c adopt d receive
39. the government is trying to do something to _d_ better understanding between the two countries.
a raise b increase c heighten d promote
promote better understanding 增进理解。
40. the newspaper did not mention the _a_ of the damage caused by the fire.
a extent b level c range d quantity
extent作核心名词，表示到…程度了，介词用to.
41. the soldier was _a_ of running away when the enemy attacked.
a accused b charged c scolded d punished
be accused of 被指控，被职责; be charged with 被指控。
42. had he worked harder， he _d_ the exams.
a must have got through b could get through
c would get through d would have got through
had he worked harder （虚拟语气） = if he had worked harder …
与过去事实相反用：情态动词 + have + 动词的过去分词。
45. it seems oil _b_ from this pipe for some time. we'll have to take the machine apart to put it right.
a had leaked b has been leaking c leaked d is leaking
for + 一段时间，做时间状语，谓语动词用完成时态。过去完成时要与一般过去时搭配。