—What should you do if you have problems with your life?

—          .[ ]

A. To find a friend to talk          

B. Find a friend to talk to

C. Finding a friend to talk to      

D. Found a friend to talk

出现在正常人尿液中的白细胞是（）

A.中性粒细胞

B.淋巴细胞

C.单核细胞

D.嗜酸性粒细胞

E.嗜碱性粒细胞