1. London is very crowded . We can't go about fast and easilly 

⇒ London is so crowded that We can't go about fast and easilly 

2. This factory is very large we have to go around it by bicycle

⇒ This factory is so  large that we have to go around it by bicycle

3. The film was interesting. Everybody could follow it through

⇒ The film was so interesting that Everybody could follow it through

4. This novel is long. It takes me several weeks to read

⇒ This novel is so long that  It takes me several weeks to read 

5. This play was boring She couldn't watch it last night

⇒ This play was so  boring that She couldn't watch it last night

II

1. He's very too stupid to understand this matter

2. This book is too difficult for me to read it

3. The river is too wide for me to swim across that river

4. These exercises are too hard for her to do them

5. My friend was too busy to come to the meeting