until then 直到那时。 hear from sb. 收到某人的来信，得到某人的消息。

22. The conference _B_ a full week by the time it ends.
A must have lasted   B will have lasted   C would last   D has lasted
见到介词by引导的时间状语，谓语动词就应是完成时态。

24. Physics is _B_ to the science which was called natural philosophy in history.
A alike   B equivalent   C likely   D uniform
be alike to sb. 对于某人来说均是一样的。 be equivalent to 相当于。
All tastes are alike to him. 所有味道对他来说都一样。

27. The new appointment of our president _A_ from the very beginning of next semester.
A takes effect   B takes part   C takes place   D takes turns
semester n. 学期； president n. 大学校长； take effect 生效，发生效力；
take part in 参与，参加； take place=happen 发生； takes turn to do sth. 轮流做某事。

28. The president made a _A_ speech at the opening ceremony of the sports meeting, which encouraged the sportsmen greatly.
A vigorous   B tedious   C flat   D harsh
ceremony n. 典礼，仪式；表达在某个典礼上介词用at。 vigorous adj. 强劲有力的，强有力的。
harsh adj. 刺耳的，令人不愉快的； flat adj. 平淡无奇的； tedious adj. 冗长无聊的。

29. It is useful to be able to predict the extent _C_ which a price change will affect supply and demand. [extent to]
A from   B with   C to   D for

30. Finding a job in such a big company has always been _D_ his wildest dreams.
A under   B over   C above   D beyond
beyond one’s wildest dreams 做梦也想不到。

31. It is not easy to learn English well, but if you _C_, you will succeed in the end.
A hang up   B hang about   C hang on   D hang onto
hang on 坚持，继续下去。

32. It is reported that _C_ adopted children want to know who their natural parents are.
A the most   B most of   C most   D the most of
most单独出现的时候有两种词性要考虑：1 adv. 非常；2 adj. 大多数的。
the most后面加多音节的形容词或副词构成该句的最高级。
most of + 名词，表示这些名词中的大多数。 make the most of 充分利用。

34. _D_ before we depart the day after tomorrow, we should have a wonderful dinner party. [Were they to arrive=If they were to arrive]
A Had they arrived   B Would they arrive   C Were they arriving   D Were they to arrive

35. The strong storm did a lot of damage to the coastal villages: several fishing boats were _A_ and many houses collapsed.
A wrecked   B spoiled   C torn   D injured
collapse vi. 倒塌，坍塌； wreck vt. （船只）遭到破坏。
torn原形是tear，n. 眼泪，vt. 撕裂，撕开。

37. As _B_ announced in today's papers, the Shanghai Export Commodities Fair is also open on Sundays.
A being   B is   C to be   D been
注意两个非限定性定语从句的引导词：as, which。
which在做非限定性定语从句引导词时有两个特点：
1 which前要有逗号与前面句子分开； 2 which引导非限定性定语从句指的是前面整句话的内容。
只要引导非限定性定语从句as和which都指一句话内容，区别在于which只能放在它所指那句话的后面，而as可以在前面也可以在后面。

38. You see the lightning _A_ it happens, but you hear the thunder later.
A the instant   B for an instant   C on the instant   D in an instant
the instant=as soon as 一…就…

39. The manager lost his _B_ just because his secretary was ten minutes late.
A mood   B temper   C mind   D passion
lose one’s temper 发脾气。

40. Great as Newton was, many of his ideas _C_ today and are being modified by the work of scientists of our time.
A are to challenge   B may be challenged   C have been challenged   D are challenging
as表示“尽管”时引导从句，从句中的表语可以放在引导词之前构成部分倒装。

41. Please be careful when you are drinking coffee in case you _D_ the new carpet.
A crash   B pollute   C spot   D stain