Question

Your sister has       bad cold, and you must give her some medicine __ this afternoon.
A. an; /                 B. a; /                  C./;the

Answer 1

B

解析试题分析：句意：你妹妹感冒了，你下午必须给她吃点药。短语have a cold感冒，要用不定冠词a；第二空有不定代词this，不需要冠词；故选B。
考点：考查冠词的用法。