6. Don't cut down trees in the forest or there will be more 

- If we cut..........down tree in the forest, there will be more ............

7. The last time the boys sang Karaoke was 2 week ago 

- The boys haven't..........sung Karaoke for 2 weeks....

8. Playing tennis is not my interest

- I am not interested.....in playing tennis ........

9. Lan likes to swim in the sea in the evenings

- Lan enjoys.....swimming in the sea in the evenings .........

10. Reading books is exciting

- I am...excited to read books ...

1. We last saw her in 2007
-> We have not seen her since 2007.

2. We stopped working in the supermarket last month​
-> We have not worked in the supermarket since last month

3. You should brush your teeth after meals
-> Please brush your teeth after meals 

4. Nam intends to visit London next week
-> Nam is going to visit London next week 

​5. Lan should plant more trees to protect the environment
-> If Lan plants more trees, it will protect the environment .

6. Don't cut down trees in the forest or there will be more 
-> If we cut down tree in the forest, there will be more 

7. The last time the boys sang Karaoke was 2 week ago 
->  The boys haven't sung Karaoke for 2 weeks

8. Playing tennis is not my interest
->  I am not interested in playing tennis 

9. Lan likes to swim in the sea in the evenings
-> Lan enjoys swimming in the sea in the evenings 

10. Reading books is exciting
-> I am excited to read books