In our class, the student leaders are on duty every few days.A．the; aB．/; aC．/;
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In our class, the student leaders are on duty every few days.
| A．the; a | B．/; a | C．/; / | D．The; / |
试题答案
C
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。