[答案] B. likelihood

　　[注释] 句意：概率是对事件发生的可能性的数学研究。

　　[答案] B. disastrous.

　　[注释] disastrous 灾难性的。

　　[答案] B. disclose.

　　[注释]disclose (=uncover; allow to be seen; make known) 透露, 使显露： 1) The lawyer disclosed the details of the case. 2) He disclosed that he had made arrangements to buy a new car. exhibit 展览, 展出, 显示, expose 暴露,discern 认出, 发现, 辨别,识别。

　　本题译文：警方拒绝透露他们正在调查的线索。

　　[答案] D. contrary to.

　　[注释] (be) contrary to 与.......相反, 违反 (作表语) :What you wish to do is contrary to the regulations. contrary to 也可以作状语：a. If you act contrary to the doctor's advice, you won't get well again. b. Contrary to what I thought, he has proved to be successful. 2) 作定语：The boy was swimming in a direction contrary to the current. (这男孩朝着逆流方向游去。)

　　[答案] C. inferior

　　[注释] inferior

　　本题译文：这位商店售货员对顾客很坦率。如果货物质量不好, 他就把情况告诉顾客。