* Give the correct form of the words in brackets to complete the sentences.
1. There are ………………………road signs in this city. (prohibit)
2. Playing the piano is one of his favorite ………………………. (relax)
3. She was a great ………………………to me when I was depressed. (comfortable)
4. Before you set your targets, make sure that they are ………………………. (achievement)
5. Building a new factory there would be ………………………disastrous. (environment)