There are so many kinds of pens in the shop.I can't decide __.A.to buy what B.to buy which C.what to buy D.which to buy请高手给个确切的答案,再讲下其中的语法知识,

There are so many cars.对so many 提问 There are so many （ ）signs here Why are there so many questions? why are there so many worries everyday? there are so many rules .it is so t＿ 到底是there is so many people还是there are so many people? 英语翻译语境There are so many questionssurrounding you,Michael.There are way too many. why there are so many people like surfing the Internet? why there are so many people loving michael jackson there are so many places of-------(history)interest in beijing. There are so many interesting places to visit in it. Oh,there are so many books here的意思 there are so many people be afraid of missing you It is great for there are so many beauties是什么意思 many,are,in,so,toys,shop,the,there,toy() there are so many kinds of food.改为感叹句 There are so many a_____ at the party There are so many police in the street.