2Youmustkeeptheroomc的精選

問題詳情：mustkeeptheroomclean,sodon'tthrow________ (垃圾)ontheground.3.Inthe18thand19th__________(世紀),manypeoplemovedtothiscity.4.Thetrip__________(通過)theforestsoundeddangerous.【回答】1.rubbish...