单项选择题A.It cannot contain any commercial information. B.It may not be of a high level of security. C.One can only use the free e-mail account at home. D.It is difficult to get access to the website with such service.
单项选择题A.A strike that has been on for a year. B.The accuracy of economists’ prediction. C.The present economic situation. D.The man’s optimism.