2. If they don't come, I will go.
→ Unless (a)  

3. If you don't come, I will go.
→ Unless (a)  

3.Mai isn't as short as Minh.

-> Minh (a)  

4. 4. I don't do as well as my mother.

-> My mother (a)  

5. I am not as careful as my sister.

-> My sister (a)   .

6. 6. She isn't as beautiful as me.

-> I (a)   .

7. This boy isn't as successful as that one.

-> That boy (a)   .

8. This house isn't so big as that one.

-> That house (a)   .

9. He was very lazzy. He couldn't get good marks . ( so....that)

->He was (a)   .

10. He was very excited. He made everyone surprised . ( so....that)

->He was (a)   .

11. The man was kind. He could help anyone . ( such....that)

->It was (a)   .

12. The girl is beautiful. Everyone has to look at her. ( such....that)

->It is (a)   .

13. " You should go to bed soon" He said to me

->He advised (a)   .

15. tonight -->_______,

tomorrow --->______

this --> ______

here---->_______

now--->________

next +N--->

(a)