Question

Examples: a ton of plastic, two oxygen cylinders, four sacks of rice, two buckets of water Read the following sentences. Identify whether the underlined nouns are Countable (C) or Uncountable (UC). 1. The children are playing in the garden. 2. I don't like milk. 3. I prefer tea. 4. Scientists say that the environment is threatened by pollution. 5. My mother uses butter to prepare cakes. 6. There are a lot of windows in our classroom. 7. We need some glue to fix this vase. 8. The waiters in this restaurant are very professional. 9. My father drinks two big glasses of water every morning. 10. The bread my mother bakes is delicious.​

Answer 1

oxygen is present 21% in air