Complete the negative sentences (x) and questions with Present Simple passive forms of the verbs. 1) These plants are grown in warm countries. They aren't grown in cold countries (x). Where are they grown? 2) Tigers are found in India. They ___ in Africa (x). ___ they ___ in any other countries? 3) St David's Day is celebrated in Wales. It ___ in England or Scotland (x). When ___ it ___? 4) Glass is made of sand and some chemicals. It ___ of rocks (x). How ___ it ___?

1. They aren't found in Africa. Are they found in any other countries?
2. It isn't celebrated in England or Scotland. When is it celebrated?
3. It isn't made of rocks. How is it made?

Present Simple Passive: am/is/are + past participle.