英语：This dictionary is not as/so useful as you think.上面的句子是不是定语从句,This dictionary as you think.

I bought this dictionary last week.(保持愿意） I ( ) ( ) this dictionary last week i buy a dictionary this morning错哪了 I hear this dictionary is very ____ for us students I bought this dictionary 3 weeks ago 改为同义句 I （）（）this dictionary for 3 weeks. 把I have had this dictionary for three years.改为同义句I had this dictionary ____ _____　______. Linda,it this ( ) dictionary? ( ) this your dictionary? This dictionary is so expensive that I can not afford it（改为简单句）This dictionary is __ expensive for me __ __ I borrowed this e-dictionary from my former schoolmate(改为同义句）:My former schoolmate （ ）this e-dictionary ( ) me. I spent 49 yuan on this English-Chinese dictionary(改为同义句) i paid 25 yuan for this dictionarythis dictionary 什么什么25 yuan I have left my dictionary at home this morning这样说对不对? i hope this dictionary will be ______（practise) in your study.适当形式填空 To my teacher I dedicate this dictionary in token of affection and gratitude.请翻译, I want some __books besides this dictionary答案为“others”,为什么不能填“another” This dictionary is () I wantedAthe one what Bwhich Cone which Dthe one -Who has a dictionary?- I have ____ A.it B.this C.one D.so Miss Liu,can you help me?I can't find this w_____ in the dictionary.