Complete the sentences with the correct form of the words in parentheses.
1. Flights should be confirmed 48 hours before (depart) ________________.
2. We apologize for the late (arrive) ________________ of the train.
3. His (inform) ________________ were middle-class professional women.
4. The water looked (cloud) ________________and not fit to drink.
5. These plants need heat and (humid) ________________to grow well.
6. It’s too (wind) ________________ to go out in the boat.
7. I have problems with my (low) ________________ back.
8. The table is available in several different (high) ________________.
9. Planes flew (head) ________________constantly.
10. Thank you for your kind (hospitable) ________________.