牙结石什么组成的?:单项选择 It is kind of you____me with my maths.

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备选答案 A.help B.helping C.to help D.for helping

据北大附中远程教育网，答案是C，即to help
见以下网址：
http://www.pkuschool.com/zadmin/manage/details.asp?TopicAbb=directions&FileName=g354yyb514aa01.htm

另外，用google,也只有C即It is kind of you to help me with my这个句子有搜索结果。其他三个选择都没有。

a

C,这里是很正常的不定式，没必要省略to

c

单项选择 It is kind of you____me with my maths. 请翻译一下“what kind of show is it”，顺便问“kind of ”的用法 Determination is a Kind of basic quality and it is__it takes to jobs well. What letter is a kind of drink? what letter is a kind of drink Sauce is a kind of r_________. Which letter is a kind of dink? What letter is a kind of drink? First,it is important to recognize what kind of person you are and which special qualities make you 一道智力题求答：I have a tree in my hand. What kind of tree is it?