Insert the most suitable part of speech: verb or adjective.

1. A good radio script should be able to the listener.
2. His good nature everyone.
3. He her in conversation.
4. He is deeply scientist.
5. The mechanism failed to , causing a fault.
6. The couple decided to get married next summer.
7. The company is to a new sales director.
8. If the telephone line is , it is already being used when you call.
9. How long have you been ?
10. She is accused of falling to with the problems of her staff.