按要求改写句子。

1. The old man is so worried that he doesn't know what he should do next. (改为同义句)        

    The old man is so worried that he doesn't know _____ _____ _____ next.    

2. Reading the long novel in so short time is not easy. (改为同义句)        

    It's not easy _____ _____ the long novel in so short time. 

3. They had fun at Lucy's birthday party last night. (改为同义句)        

    They _____ _____ _____ _____ at Lucy's birthday party last night.

4. The story made me laugh. (改为被动语态)        

    I _____ ______ _____ _____ by the story.

5. Pollution makes me feel kind of angry. (对画线部分提问)         

    _____ ____ pollution make you feel?

肠道恶性肿瘤的特有征象是

A.假肾征 

B.肠壁增厚 

C.肠腔变窄 

D.局部肠腔扩张 

E.肠壁节段性增厚