Question

________ old man behind Mary is ________ university teacher.

A．An, an

B．A, the

C．The, a

D．The, an

Answer 1

C

此题重点考查冠词的基本用法。不定冠词有a和an两种：a用于辅音音素开头的词前，an用于元音音素开头的词前。定冠词the表示特指。