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

　　A whatever B whomever C whichever D whoever

　　they thought是插入语，可以不看; tourist guide 导游。

　　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：如果冲突以后能回家反省一下自己是好事情。

　　in that 因为; conflict n. 冲突; relative merits 相比较而言的优点; 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. 乐观的; pessimistic adj. 悲观的; be optimistic about 对…持乐观态度。

　　optional adj. 随意的，任选的，非强制性的; optional courses 选修课;

　　outstanding adj. 卓越的，杰出的; obvious adj. 明显的。

　　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虚拟语气。

　　与现在事实相反，wish后的句子经常用一般过去时来体现虚拟语气。

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

　　A at B in C of D with

　　be critical of 对。。.爱挑剔的，批评。

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

　　A attack B burst C split D blast

　　within reach 够得着; out of reach 够不着; burst 爆发，迸发;

　　burst可以与很多词语搭配表示突然发作：

　　1 能与人的情绪(喜、怒、哀、乐)搭配; 2 能与掌声、笑声搭配。