用所给动词的适当形式填空。

1. Hello, I _____ (not know) you _____(be) in London. How long have you been

there?

2. By the end of last week, he _____(read) this book four times.

3. I _____ (not have) any English knowledge before I came here.

4. I _____(lose) my keys. I can't remember where I last saw them.

5. －_____you _____ (see) the film yet'?

    －Yes, I _____(see) it last week.

医院信息的特点是（）

A.复杂性和多样性

B.普遍性和时效性

C.依附性和传递性

D.共享性和可加工性

E.可伪性和复杂性