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. 學期; president n. 大學校長; take effect 生效，發生效力;

　　take part in 參與，參加; take place=happen 發生; takes turn to do sth. 輪流做某事。

　　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. 典禮，儀式;表達在某個典禮上介詞用at。 vigorous adj. 強勁有力的，強有力的。

　　harsh adj. 刺耳的，令人不愉快的; flat adj. 平淡無奇的; tedious adj. 冗長無聊的。

　　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 做夢也想不到。

　　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 堅持，繼續下去。

　　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單獨出現的時候有兩種詞性要考慮：1 adv. 非常;2 adj. 大多數的。

　　the most后面加多音節的形容詞或副詞構成該句的最高級。

　　most of + 名詞，表示這些名詞中的大多數。 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)遭到破壞。

　　torn原形是tear，n. 眼淚，vt. 撕裂，撕開。

　　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

　　注意兩個非限定性定語從句的引導詞：as, which。

　　which在做非限定性定語從句引導詞時有兩個特點：

　　1 which前要有逗號與前面句子分開; 2 which引導非限定性定語從句指的是前面整句話的內容。

　　只要引導非限定性定語從句as和which都指一句話內容，區別在于which只能放在它所指那句話的后面，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 發脾氣。

　　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“盡管”時引導從句，從句中的表語可以放在引導詞之前構成部分倒裝。