_______is studing to get better skills.

When studing, all students need _______.

Stressors are three kinds, and they are ______________. A: biological B: studing C: mental D: social

study现在分词形式 A: studying B: studies C: studing D: studied

Last time we learned part of the test. Today let’s go on ________ it. A: to study B: study C: studying D: with studing

在DIALOG系统的检索中,使用截词检索技术“stud????”可以检索到下面的单词有()。 A: study B: studies C: studied D: studing