1. (2017·无锡模拟) 语法填空  

1. （1） The skilled doctor managed to prevent the patient going from bad to  (bad).
3. （2） Molly looks young and beautiful. It's hard to imagine she is already in her  (fifty).
5. （3） There may be no  (possible) for you to find happiness if you depend on one thing or one person.
7. （4） Mike felt sleepy at the concert because he  (simple) has no interest in music.