Professor Xu gave us a talk on how to (保护) the environment last week.
As far as we know, safety comes first (无论什么) you do.
The lovely boy often (分享) his toys with other kids.
你读得越多,你就会学得越多.
这位老人习惯于早上7点起床
在我们学校,学生不允许用手机 (mobile phones)