Question

4. (2015 •河南) Mr Smith is old man and he usually walks his dog after supper.

   A. a;the   B. an; a   C. an; /   D. the; /

Answer 1

4. C

4. C解析：表示“一位老人”要用an old man,old前要用不定冠词an; after supper意为 “晚饭后”，supper前不加任何冠词。