I'm sure cars powered by solar energy will be popular in the

I'm sure cars powered by solar energy will be popular in the 英语翻译1.All cars will be powered by electricity,solar energy o cars will be the most popular m____of transportation in the Will you be back ____five in the afternoon?---I'm not sure,m I'm sure the Olympic Games will be held in 2008 in China,___ I'm sure the 2012 Olympic Games will be held in London,____? I'm sure the 2012 olympic games will be held in London,____ I’m sure that he will be back in ____. there will be buildings in our city ,I'm sure I'm sure the a___ will be "yes" cars in the future will be green Also,in England,the old steam-powered trainis very popular .