他要学习 Keep quiet! He is studying.5.星期五晚上他能顺便来我家吗?On Friday evening, will he be able to call at my house?6.让我们讨论一下这个科学报告吧 Let's talk about this scientific repor
Now people need a speed of society, and the development of science is to make our life more convenient;The development of science make medicine more developed, so many people out of pain;Is the development