问题
选择题
In our class, the student leaders are on duty every few days.
A．the; a
B．/; a
C．/; /
D．The; /
答案
答案：C
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。
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In our class, the student leaders are on duty every few days.
A．the; a
B．/; a
C．/; /
D．The; /
答案：C
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。
