【单选题】
These students are so busy with their lessons that they go to big department stores once in a while.
A.in no time
B.now and then
C.then and there
D.all at once
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根据网考网移动考试中心的统计,该试题:
9%的考友选择了A选项
82%的考友选择了B选项
7%的考友选择了C选项
2%的考友选择了D选项