题目

Computer viruses are electronic programs that destroy information on a computer or cause the computer to stop working. computer experts say the “ I love you ” virus is one of the most dangerous they have ever seen. It began spreading May Fourth and quickly attacked computers in more than twenty countries. It may have caused a loss of 10 billion dollars in destroyed information and lost computer work time. The virus got in each  computer as electronic mail that appeared to be sent from a friend with title “ I love you.” When the computer user opened the message, the virus did se15．The Greens had to come back by taxi because it began to rainheavily （大）．