It isn't p____for her to finish the work in such a short time.怎么填?

It isn't p____for her to finish the work in such a short time.怎么填? he isn`t usually like it It isn't ()(he) pen,it's ()(she) he has come late,isn't it?反义疑问句为什么要用isn't it? Is that your brother?回答A.No,it isn't B.No,he isn't that is your twin brother,----?反义疑问句是 isn't he 还是isn't it? “What a lovely boy!”的反义疑问句是什么?A,isn't it?B,isn't he? Is that boy Ted?A.NO ,he isn`t B.NO ,it isn`t.填那个 Isn't he cute?____________.I like it very much.A.Yes,it isn't B.No,it isC.Yes,it is D.No,it isn't Zhou Hai isn't here today.M------ he is it. Isn't he cute? NO he isn't no,it isn't isn't it nice say it isn`t It's the second time that Jack has been late,--?A.hasn't he B.isn't he C.isn't it D.hasn't it为什么呢? Is this woman your mother?No____A.he is B.he isn't Cshe is Dshe isn't为啥回答不能用“It,isn't” It`s the first time that he has been to Australia,isn`t it?中,为什么要用isn`t it,而不用hasn`t he?