单词拼写（共10小题；每小题1分，满分10分）

根据首字母或汉语注释写出单词的正确形式，并将答案填写到题中的相应位置。

小题1:We should e_______ new ways to solve the problemss that we are facing.

小题2:I meant it to be a(n) i______(非正式的) discussion, but it didn’t turn out as I mentioned

小题3:Playing basketball is one form of p_______(身体的) exercise.

小题4:He caused his parents a great deal of s_____(痛苦).

小题5: That black suitcase on the floor b_________ to me..

小题6: She looks very _____(熟悉的),but I can’t remember where I met her.

小题7:She refused to answer questions about her personal f_____(财力)。

小题8:There are a lot of c____ relics in our country.

小题9:S____ this difficult problem to make it easier to be understood by everyone.

小题10:The a____(外观) of the old house completely changed.

下列可标记自然杀伤细胞的是（）

A.CD68

B.CD56

C.CD3

D.CD20

E.CD31