1. We went to bed early because we were very tired
> We were.....very tired, so we went to bed early..............
2. The lesson is very difficult. We can't understand it
> It is such..........a difficult lesson that we can;t understand it..........
3. The car is so old that he doesn't want to drive it
> It is such........an old car that he doesn't want to drive it. ..........
4. The weather was very cold.we couldn't go out
> The weather was too......cold (for us) to go out...........
5. The film was so interesting that we couldn't miss it
> It was such........an interesting film that we couldn't miss it..........
6. David has to many girlfriends. he can't remembar all of their names
> David has so........many girlfriend that he can't remember all of their names......
7. Tom drives too fast, so he often causes accidents
> Tom drives so,.......fast that he often cause accidents...........
8. This is good tea. i think i'll have another cup
> This is such....the good tea that I think I'll have another cup.........
9. John was very angry. he couldn't say anything
> John was too....angry to say anything....................................
10. These exercises are so long that i can't finish them in an hour
> They are......such long exercises that I can't finish them in hour...........
11. She is old. she can work by herself (enough)
> She is.....old enough to work by herself......................
12. The boy is intelligent. he can understand you (enough)
> The boy is......intelligent enough to understand you..............
13. Mai is good. she can pass the examination (enough)
> Mai is....good enough to pass the examination...............
14. The story is short. we can read it in one hour  (enough)
> The story is......short enough for us to read it in one hour.........
15. The film was very good. we saw it through (enough)
> The film was....good enough for us to see it through............