I once watched _____ one-act play, which was played by ___ 11-year-old boy.
| A．a , a | B．an , an |
| C．a , an | D．an , a |
255. Keith just shrugged his _____ and said it wasn’t his problem.
| A．shoulder | B．shoulders | C．arms | D．Bodies |
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 |