Mr.Duck is looking at his shopping l

Mr.Duck is looking at his shopping l Mr.Duck is looking at his shopping l_____ Mr.Duck is looking at his shoppin l___!应该填什么? Mr Jones and his wife and looking at them,Sally is looking a Mr Black is looking ____(angry) at his students now.顺便说说知识点（ Mr.jons and his wife are looking at the ship.中的and与Mr.jons w He is looking ---(angry)at his son .He looks----- His dog is(looks looking look)at the children Mr.Jones and his wife （are） looking at them 和Sometimes he an Mr.Jones and his wife are looking at them这句中are的作用 That duck is swimming slowly.It is looking ( ) something to Mr.jones and his wife are looking at them.这里为什么用ARE 和AT.特别是A