It may be necessary to stop ______ (每隔……时间) in the learning process and go back to the difficult points in the lessons.

admin2012-10-11  30

问题 It may be necessary to stop ______ (每隔……时间) in the learning process and go back to the difficult points in the lessons.

选项

答案at intervals

解析
转载请注明原文地址:https://kaotiyun.com/show/Umb7777K
0

最新回复(0)