问题补充:
As volunteer teacher in the rural area,she has opened up students eyes to the outside world.
A. the; the
B. a; a
C. a; the
D. the; a
答案:
A. the; the
B. a; a
(答案→)C. a; the
D. the; a
解析:第一次提到某人或某物时用不定冠词a/an,而本题后接的单词为辅音音标开头,故第一空用a,第二空是特指,用定冠词the,故选C