OnedayBobtooktwoofhisfriendsintothemountains.Theyputupt...
问题详情：OnedayBobtooktwoofhisfriendsintothemountains.Theyputuptheirtentsandthenrodeofftoaforesttoseehowthetreesweregrowing.Intheafternoonwhentheywereabouttenkilometersfromtheircamp,itstartedtosnow.Mor...