At which table are they sitting?该句与Which table are they sitting at?有何差别?类似的句子还有：For which traffic sign do I have to look out?From whom did you borrow it?都是病句吗?

the children are required to learn table manners,--very important at table.A.which isB.which areC.what areD.that is The man at the table isn’t at table. Mike and his father are sitting at the table .They are having their lunch .I don't like this soup At which table are they sitting?该句与Which table are they sitting at?有何差别?类似的句子还有：For which traffic sign do I have to look out?From whom did you borrow it?都是病句吗? help--What are the Green doing now?--They are ____________.A.at the table B.on the table C.at table D.on table 为何句末介词不能省略?例如：Which table are they sitting (at)?There is a big box to pack all the clothes (in).Have you got a pen to sign these papers (with)?另外第一句可以这样改吗：At which table are they sitting?尤其迷惑 One evening,the Greens are having supper at the table There are some old men_____the table.A:at B:on There are twelve people at the table.(对twelve提问) Chinese people are very ()(good) at piaying table tennis. at table ,at the table,on the table,on table, Mike and his father are sitting at the table Mike and his father are sitting at the table.They are having their lunch.I don't like this soup.I don't want to drink it.says Mike and puts down the spoon.After lunch,Mike and his father work in the fiel on table,at table区别 请问是There is/are some candles on the table this moning,but there isn`t/aren`t any mow.There is/are something on the plate.用the,girl,nice,was,to,look,at 组句 at table和at the table?区别 at table,at the table怎么区别? He is at table at the table. It is middle of the day.Mother and Tom are sittinIt is middle of the day.Mother and Tom are sitting at the table . They are having lunch. There is some rice, bread and meat on the table."I don't like any rice. Idon't want to eat it"