It is Pat who will do all the work. 句中it是主语吗?那如果出1道题目问我这句句子的主语是哪个，我应该怎么回答？ ？

( ) is Pat?He is tallA What B How C How old D Who It is Pat who will do all the work. 句中it是主语吗?那如果出1道题目问我这句句子的主语是哪个，我应该怎么回答？ ？ Someone is singing now.Who （）it be?A.must B.should C.can D.will See who is there!＿it be Mary A May B must C can D will it is said that he will be appointed as _______ is known as the ceoA.which B.whom C.who D.what为什么选择what 而不是who Is it just yourself who will travel?是什么句式?who will travel 是定语?请讲戏些 See who is there! ____ it be may?a. May b. Can c. Must d. Will为什么选B? It is hard to say who will win.(同义句转换）It is ___ to say who will ___the____. It is a rule that ____wins the election will gain the support of both parties.[A] who [B] no matter who [C] whoever [D] whomever he who will not learn when he is young will regret it when he is old it does not matter who____i am talking to.A.who it is B who it is that C.it is who D.it is whom Someone is knocking at the door.Who can it be?的回答.A.Nothing B.I will go and answer itC.Cheer up D.You make it. someone is knocking at the door .（）i go and see who it is A shall B do C will D have to.选什么、 Someone is ringing the doorbell.Go and see____A.who is he B.who he is C.who is it D.who it is选什么?理由~ There is someone ringing the door bell.Who _____ it be?A) can B) must C) may D) will为什么不能是 D ___knows the truth about it will tell you.A.Who that B.Who C.Whoever D.That who -( )dress is it?-it's hers A.Who's B.Whose C.Is it D.Which who is it