下列那一个指令可以清除屏幕？（）A.cls B.clear C.check D.pu 发布时间：2017-11-01 16:57 │ 来源：www.tikuol.com 题型：单项选择题 问题： 下列那一个指令可以清除屏幕？（）A.clsB.clearC.checkD.put
题型：单项选择题 Not only his parents but also his twin brother _____ to South Korea. They will be back by the end of next month.A. have beenB. have gone C. has been D. has gone 查看答案