单选题
Our advertising staff members meet ______ a week to discuss plans for
the upcoming project.
A. one
B. each
C. every
D. once
【正确答案】
D
【答案解析】[解析] 词汇：副词
1．B选项each和C选项every可用作each week、every week，注意不和冠词连用。
2．“每周一次”可写作once a week，D．once为正确选项。
3．注意其他频度副词的使用：twice a week，three times a week。