问题补充:
walk is expected to last all day,so bring packed lunch.
A. A;a
B. The;/
C. The;a
D. A;/
答案:
A. A;a
B. The;/
(答案→)C. The;a
D. A;/
解析:C英语中,有些抽象名词,如:knowledge,history,failure,success,help,pleasure,surprise,honour等表示抽象概念时,其前面不用不定冠词,如:with pleasure,in surprise等。但是,当表示具体的概念时,其前面应用不定冠词,也可以用其复数形式。