1.ThesuggestiontheEnglishteachergaveisthattheboy___morespraking
A.mustdoB.shoulddoC.woulddoD.does
为什么选B而不选D
2.Itiseasy后面是跟todo还是doing
3.Theletterisfrommysister,___isworkinginbeijing
为什么要填who,which不可以么?