【简答题】We are lucky to live in a rich country where we have many things. However, most of us usually some things. Electricity is one thing that we waste ____. Lights, TVs, and other things are often kept on ...
【单选题】We really got ripped off by that security company. This burglar alarm won’t work unless we are lucky or the burglar uses the front door, so we can’t count on it. I think we need a new alarm. Which of ...