问题
选择题
As a rule, this hotel offers___18 percent discount for____guests staying on Friday and Saturday.
A．a; the
B．the; the
C．the;不填
D．an;不填
答案
答案：D
考查冠词：第一空填an，指18%的折扣，第二空不填，泛指客人，句意是：通常情况下，旅店给周五周六住宿的客人打18%的折扣。选D。
