找出"S"读音与其他三个不同的单词,说下理由
shopschairsclassroomsrulers
找出下列句子中的一处错误
WangLingisnotatthehometoday.
WangLan,LiFenandhersisterallareatschool.
Tom,MikeandMaryareondutiestoday.
Sorry,areyouanAmerican?Yes.
Areeveryonehere?No,MingmingandPingpingaren't.
Thisisyourcoat.Putonit,please.Ok.
Amanbehindmyfatherismymother'sbrother.
Therearefortyknifesinthebox.
Arethesecoatshisorher?