用括号里单词的适当形式填空。

1. Our teachers are all       ( friend) to me.

2. I feel like       (have) sports in my spare time.

3. In the afternoon there are many women with their        (baby) in their arms in the garden.

4. We had a hard time          (work) out the problem.

5. -          you        your shoes?  -Yes, we         hem just now. ( clean)

下图为肾小体结构示意图，请据图回答下列问题：      

  

（1）请写出图中①、②所示结构的名称：① ___________②____________ 

（2）图中④所示的结构叫肾小囊腔，其中的液体叫___________，它是血液流经③（肾小球）时，经过了____________________作用形成的，再经过肾小管的_________________ 作用才能形成尿液。