Complete the negative sentences and questions with one word in each gap.

1. These plants are grown in warm countries. They aren't grown in cold countries. Where are they grown? 2. Tigers are found in India. They aren't found in Africa. Are they found in any other country? 3. St David's Day is celebrated in Wales. It isn't celebrated in England or Scotland. When is it celebrated? 4. Glass is made of sand and some chemicals. It isn't made of rocks. How is it made?