This is___from the book.A what did i learn B.what i taught C

This is___from the book.A what did i learn B.what i taught C This is the book( ) I am looking for.A.it B./ C.what This is the very book ___ I'm looking for.A.it B.what C.wher This is the book _____ I am looking for.A.what B.that C.who I find-----not easy to learn math well A,this B,that C,what a.This was what I did. What did you do just now?___ A I read a book.B I I did ---to help the poor.A.all what l could B.all which l c I forgot what I was taught,I only remember what I have learn A:look!() this in English.A.What B.what are C.What is B:It i He asked me ______last weekend.A.what Idid B.what did I do C 选择题:This is ____ want. A:I what B: what I C:what I'm 该选哪个?为什