1. 选用方框内所给短语的正确形式填空

fall behind   pay attention to   take on   be suitable for   devote...to...

1. （1） He could have finished it on schedule, but somehow he.
3. （2） Do you think this new dressme?
5. （3） Great changes has taken place in my hometown and ita new look.
7. （4） Heall his spare timehelping his students with their English when he worked here.
9. （5） These are the things we shouldso as to stay healthy.