1. There are 7,500,000 people in London. ( Câu đầu tiên á: there are a population of about 7,500,000)

2. No, it isn't. (Tại vì: but now, there are many cities which are much bigger)

3. Harrods is a shop where you can buy everything.( They also come for...)

4. Smog is a mixture of smoke and fog.

5. No. ( Tại vì: The air isn't clean...)

1. How many people are there in London?

         There are about 7,500,000 people in London.

      2.Is London the biggest city in the world?

          No, it isn’t.

      3.What is Harrods?

         Harrods is the shops.

      4.What is smog?

         Smog is a mixture of smoke and fog.

      5.Was London cleaner 100 years ago than it is now?

         No, it wasn’t.
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