用所给词的适当形式填空。

1. He has a lot of homework _____ (do)

2. I'm not sure whether I _____ (be) on time.

3. If we _____ (take) good care of the young trees, they will grow up quickly.

4. Have you read the book _____ (call) "Gone with the wind"?

5. We _____ (come) if it doesn't rain tomorrow.

6. You have to spend half an hour _____ (read) English every day.

7. Here _____ (come) the bus!

8. Is that house large enough for all of us _____ (live) in ?

9. When school was over yesterday, it _____ (snow).

10. I'm too tired. let's _____ (stop) to have a rest.

腹泻每日6次以上，体重短期内明显下降，有明显黏液脓血便( )

A．Crohn病
B．轻型溃疡性结肠炎
C．中型溃疡性结肠炎
D．重型溃疡性结肠炎
E．溃疡性结肠炎癌变