They have three daughters,all___are doctors.A.of whom B.of them C.of which D.who这里应该选A,但是B为什么错?谢谢!

they have three pencils.对three提问 They have three meals 改为一般疑问句 They have many pets,i______ three cats. They have three meals.(改为一般疑问句) ____ they ____ three meals? they have three tennis balls.改为一般疑问句 Thursday have Chinese on they lessons three【连词成句】 I have three new teachers.who什么they? They have many pets including three cats.原型不行吗 They have three red big apples.有一处错误,请改正 They have been there for three days.与they have gone there for three days.哪个是对的?为什么 英语翻译they have four classes.In the afternoon they have three classer. They have three pencils.(对划线部分提问）three是画线的 They have four children,three of whom live abroad为什么是three of whom 而不是three of them they have learnt English since three years ago.改为同义句____ three years ____ they started learning English. 适当形式填空 They have three ping-pong bats and they need------（many） For carrier,they have three responsibilities for B/L,what are they? Chinese people have three m______ a day. They don't have afternoon tea. with the help of teachers,they have made great progress( )A three years agoB in the past three yearsC for three yearsD before three years