In our class the student leaders are on duty every few days.A. the; aB. /; aC. /; /D. The

问题补充：

In our class, the student leaders are on duty every few days.

A. the; a

B. /; a

C. /; /

D. The; /

答案：

A. the; a

B. /; a

(答案→)C. /; /

D. The; /

解析：

这题考查冠词，而且是固定结构，on duty是值日，every few days是每隔几天。