阅读短文，从方框中选择适当的动词，并用其适当形式填空。有的需要加助动词或不定式符号。（每词限用一次）

have   knock    happen   call   work   

Last weekend, Jim went to see a film. It was about a boy 1___________Bob. Bob lived with his parents in a small town. They were very poor. Bob’s father 2___________ in a market for a long time. Bob wanted 3___________a bike very much.

One day, an old man 4___________down by some boys, and they ran away. Bob went to help the old man. The old man gave him a magic book and told Bob to make a wish before opening it.

Can you guess what 5___________ in the end? Please watch the film and find out!

如图为血液的组成图，请据图回答：

（1）甲试管出现分层现象，原因是试管内加入了______．

（2）乙图中这些细胞位于甲试管中的______处（填写字母）．

（3）A的功能是______

（4）血友病患者受伤后血流不止，这主要与乙图标号______这种成分有关．

（5）某病人经检验3的数量比一般人多得多，该病人身体某部位可能______．