this dictionary is in that box复数

I hear this dictionary is very ____ for us students this is a dictionary( )you This is his dictionary同义 This dictionary is so expensive that I can not afford it（改为简单句）This dictionary is __ expensive for me __ __ This dictionary is () I wantedAthe one what Bwhich Cone which Dthe one This is his dictionary(一般疑问句) this dictionary is in that box复数 Is this your dictionary?改为肯定句 This is his dictionary(改为一般疑问句) This is my dictionary.改为疑问句 This is a dictionary (作否定回答 Is,this,your,dictionary?(改陈述) Is this your dictionary肯定回答 This is my dictionary做否定形式 This dictionary is w______ five yuan. Is this her dictionary?(作肯定回答) I bought this dictionary last week.(保持愿意） I ( ) ( ) this dictionary last week 填冠词.2.This is a useful dictionary,I think.So it is,and it's( ) unusual one.