this dictionary is very useful,it has______many problems about idiom for mea.look up b.kept up c.taken up d.cleared up选什么,为什么

this is a dictionary( )you This is his dictionary同义 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) This dictionary helps us a lot的同义词This dictionary is very＿to us This is a dictionary.(划线提问)用四个单词画线部分是a dictionary This is a dictionary.(对划线部分提问.注：划线部分为a dictionary) this dictionary than thin one that is连词成句? Is this his English-Chinese dictionary.改为肯定式陈述句