- You are to install an alarm system.- What for?- Well, there are burglars around here. They steal things from people's homes.- Really?- Yes, you should tell your parents.- You're right. They should probably install an alarm system.- And you have to be careful with the keys. Do not lose them or leave them near an open window.- I do not think about it. You know, there's a lot of crime in urban areas these days.- I think you're right. We must be careful.- Yes, it is better to be on the safe side than to worry!