单项选择题
A．It is a children's hospital. B．it has strict rules about visiting hour. C．The conditions there aren't very good. D．The nurses and doctors there don't work hard.
A．Since no other persons are here, I wont disclose (揭发) it B．It will certainly be a miracle if I don't disclose it C．There isn't any fish in the stream D．I will surely report you to the owner of the stream
A．Many computers were attacked by a virus in the U. S. B．Many computers attacked by a virus in the U.S. lost their information. C．A computer virus can harm human body. D．A computer virus can help the computer owner do many things.