4 Complete the negative sentences (X) 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** in Africa.
They **aren't** in any other country?

3. St David's Day is celebrated in Wales.
It **isn't** in England or Scotland.
When **is** it?

4. Glass is made of sand and some chemicals.
It **is** of rocks.
How **is** it?