everything has cannot stay the same everything -

is different 再问： there is a post office opposite my school there is a post office ___ ___my school再问： i think his sister is an outgoing girl___ ___ ___ his sister is an outgoing girl再问： what are you looking for behind the tree?what are you ___ ___ behind the tree 再答： across 再答： in my opinion 再答： searching for再问： 第一个有两空 再答： across to再问： thx