11. absence

12. variety

16. You aren't as short as me.

17. My bicycle isn't as nice as your.

18. Lan is as pretty as her sister.

19. Cats are different from dogs.

20. Mr. Brown is the same age as Mrs. Brown.

1. What did you do at 6 pm yesterday.

2. Before Alice went to sleep,she called her family.

3. He has taught in this school before he left for England.

4. When John and I got to the theatre, the movie has started already

5. We will go out when the rain stops.

6. I will stay here until he answers me.

7. Wait until I catch you.

8. Miss Alen will help you as soon as she finishes that letter tomorrow.

9. I will wait here until you come back tomorrow.

10. My mother will come to stay with us next weekend.

11. Don't leave until you see her

12. We will start our plan next Sunday

13. He will work on the report at this time tomorrow

14. I'm sure they will have completed the new road by June

15. At this time tomorrow,we will be driving through Pennsylvania

16. Who will look after the children when you are away ?

17. By November I will have been working for this company for 6 years.

18. By March 15, I will have been here for one year

19. We will move to our new house at Christmas this year

1. The time machine will be shown to the public when it is finished.

2. He was able  to dance when he was only 3 years old.

3. Are the flowers watered everyday?

4. I'm very sad not to be accepted in that group.

5. You don't need to finish the work today.

6. I found traveling by bus is uncomfortable

7. We last ate seafood was a long time ago.

8. The teacher told us to turn off the lights before leaving the classroom.

9. Because of the heavy rain, we didn't go out for a walk yesterday

10. Unless the weather improves , the garden party won't take place

11. He was delighted that he received his aunt's letter.

12. People recycle old car tires to make shoes and sandals.

13. Nga used to get up late when she was young.

1. What is Mark doing now?

2. How are you going to Da Lat this summer?

3. Who should I phone?

4. When does Peter go home?

5. How often did she often come to the dancing club last year?