53. We agree to accept _D_ they thought was the best tourist guide.

　　A whatever B whomever C whichever D whoever

　　they thought是插入語，可以不看; tourist guide 導游。

　　56. Although many people view conflict as bad， conflict is sometimes useful _C_ it forces people to test relative merits of their attitudes and behaviors.

　　A by which B to which C in that D so that

　　句子的意思是：如果沖突以后能回家反省一下自己是好事情。

　　in that 因為; conflict n. 沖突; relative merits 相比較而言的優點; so that 以至于。

　　57. He is _A_ about his chances of winning a gold medal in the Olympics next year.

　　A optimistic B optional C outstanding D obvious

　　optimistic adj. 樂觀的; pessimistic adj. 悲觀的; be optimistic about 對…持樂觀態度。

　　optional adj. 隨意的，任選的，非強制性的; optional courses 選修課;

　　outstanding adj. 卓越的，杰出的; obvious adj. 明顯的。

　　58. Sometimes I wish I _B_ in a different time and a different place.

　　A be living B were living C would live D would have lived

　　wish后加的句子一定要用虛擬語氣。

　　與現在事實相反，wish后的句子經常用一般過去時來體現虛擬語氣。

　　59. The director was critical _C_ the way we were doing the work.

　　A at B in C of D with

　　be critical of 對。。.愛挑剔的，批評。

　　60. In a sudden _B_ of anger， the man tore up everything within reach.

　　A attack B burst C split D blast

　　within reach 夠得著; out of reach 夠不著; burst 爆發，迸發;

　　burst可以與很多詞語搭配表示突然發作：

　　1 能與人的情緒(喜、怒、哀、樂)搭配; 2 能與掌聲、笑聲搭配。