问题补充：
We were shocked to hear the news that two Chinese engineers were shot to death in Pakistan. Worse still, third one died in hospital afterwards.
A. /; a
B. the; the
C. the; a
D. /; the
答案：
(答案→)A. /; a
B. the; the
C. the; a
D. /; the
解析：考查冠词的用法。two Chinese engineers是复数形式，不需用冠词；不定冠词和序数词连用，表示“在原来的基础上再多......”。本句的a third意为“又有一个”。故选A。
