任务型阅读Is your schoolbag too heavy to carry?The e-schoolbag wi

任务型阅读
Is your schoolbag too heavy to carry?The e-schoolbag will help you.It is says that e-schoolbag will come into use in Chinese middle schools soon.Heavy schoolbags have been a serious problem for a long time.But the e-schoolbag will work it out.An e-schoolbag is much lighter than a usualschoolbag.Perhaps,the e-schoolbag should be calling an e-textbook.It is as smaller as a usual book,but it can still have all the things for study,such as a textbook,an exercise book and so on.They can be made into chipslike stamps.The students can read the text page by page on the screen,take nots,or even send e-mails to their teachers.They only need to bring the right chip into the e-schoolbag and then the students can use it.Some people say that e-textbooks can be easily broken,while others say it is not good to student's eyes.But only time wil tell.
1.The underlined word "screen" means _____ in Chinese
2.What are e-schoolbags used for?____________.
3."But only time tell"means in Chinese ___________.