问题详情:
It may be necessary to stop__in the learning process and go back to the difficult points in the lessons.
A. at intervals B. at random C. at ease D. at length
【回答】
C
知识点:词组 短语
题型:选择题
问题详情:
It may be necessary to stop__in the learning process and go back to the difficult points in the lessons.
A. at intervals B. at random C. at ease D. at length
【回答】
C
知识点:词组 短语
题型:选择题