What‘s the teacher doing by saying 'Who wants to have a try'?

单项选择题岩石各种强度之间的关系是()。

未分类题When the teacher is presenting a new language， giving explanations， checking answers，which of the following should be adopted?

单项选择题井下爆破，最常用的联线方式是()。

未分类题Which of the following is not the problem when the wife earns more than her husband? 查看材料

未分类题There are some speaking activities. Which of the following mainly focuses on the form. andaccuracy?