A: What do you often do in your spare time?B: I like playing computer games. It's really cool and exciting. When I play computer games, I always forget all my worries. What about you?A: I also like playing computer games. But I think sometimes it's a waste of time. And it is also bad for our health if we spend too much time ...
John: Help!I just found out that I have a virus on my computer!Joanne: Oh, that's terrible.Justin: Me too.That's why I have two anti-virus software installed.John:I hav...
