We often provide our children with toys, footballs or basketballs, ___   that all children like these things.    [ ]

A. thinking  

B.think  

C.to think  

D.thought

下面哪种血尿应考虑肾、输尿管结石（）

A.无痛性血尿

B.终末血尿

C.活动后血尿

D.初期血尿

E.严重血尿伴血块