254. You can recognize a tree by the ______ of its _______.

A. shapes…leaves　 　　 B. shape…leaf　 　　　　　 C. shape… leaves　 　　 D. shapes…leaf

253. I have to wear a _____ and a tie in order to work in the manager’s office.

　　　 A. clothes　　 　　　　　　　 B. dress　 　　　　　　　　　 C. shirt　　　 　　　　　　　　　　 D. clothing

252. One of the purposes of United Nations is to achieve international co-operation without distinction as to race,____, language or religion.

　 　　 A. sex　　 　　　　　　　　 B. female　　 　　　　　　 C. male　　 　　　　　　　　 D. skin

251. The America’s selling weapons to Taiwan cast a shadow on the Sino-U.S relationship. Which of the following can explain the underlined part?

　 　　 A. was a good omen on　 B. had ill effect on　　 C. was at war with 　　　　　　　 D. effected

250. Every year Harvard University awards　　　 to excellent foreign students in theoretical physics.

　 　 A. bonus　　　 　　　　　　 B. scholarships　　 　　 C. rewards　　　 　　　　 D. pensions

249. A_____ has taught us what atoms are made up of and how powerful the atom bomb is.

　　　 A. seaman　　 　　　　　　 B. salesman　　 　　　　　 C. naturalist　　　 　　　　　　　 D. scientist

248. A group of the red scarves are playing on the seaside_______.

A. sand　　 　　　　　　　　 B. sands　　 　　　　　　　 C. sail　　 　　　　　　　　　 D. salts

247. He found it quite impossible to learn _____ well in less than 6 months so he registered for the next semester(term).

A. Russian　　 　　　　　　 B. Russians　　 　　　　　　 C. Russia　 　 　　　　　　　 D. Russias

246. Nelson Mandela played and is still playing a leading ________ in ending apartheid(种族隔离政策) in South Africa.

A. use　　 　　　　　　　　 B. roles　　　 　　　　　　 C. role　　　 　　　　　　　 D. parts

245. After work, the young man and his colleagues went to the nearest _____ and sat down at the table for a grand dinner.

A. bar　　 　　　　　 　　　 B. cafe　　　　 　　　　　 C. restaurant　　 　　　　 D. dining-room