1. Listen! I think someone is knocking at the door. 
(Listen)
2. Up to the present, we have been writing almost every lesson in the book. 
(Up to the present)
3. The earth circles the sun once every 365 days. 
(Cái này chỉ sự thật hiển nhiên nên trong trường hợp nào đi chăng nữa thì luôn chia hiện tại)
4. The farmers are working in the field at the moment. 
(at the moment)
5. How many times have you seen him since he went to Edinburgh?
(since) 
6. Rivers usually flow to the sea. 
(usually)
7. Look! The boy is crying. 
(Look!)
8. Do you know that man who is smoking there? 
(Dịch nghĩa)
9. Mrs.Green always goes to work by bus. 
(always)
10. We are from French. We have been there for 20 years. 
(for 20 years)
11. That house belongs to Mr.Green. 
(Sự thật)
12. Mai has lost her dictionary. 
(Dich)
13. I am sorry. I forgot that girl's name already. 
(already)
14. I have been waiting for the manager for 2 hours. 
(for 2 hours)
15. Have you ever seen a lion?
(ever)
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