The police are offering reward of $50 000 for information leading to the arrest of murde

问题补充：

The police are offering reward of $50,000 for information leading to the arrest of murderer.

A. the; the

B. a; a

C. the; a

D. a; the

答案：

A. the; the

B. a; a

C. the; a

(答案→)D. a; the

解析：考查冠词。前文一笔五万美元的奖金为泛指，故用不定冠词。下文特指前面因之受奖的这个凶手，故用定冠词。选D。