12.bakery

13.careful

14.pollution

15.Japanese

16.addictive

17.socializing

18.excited 

19.relaxing

I.

1.are → is

2.staying → to stay

3.too many → too much

4.relaxed → relaxing

5.sound → sounds

6.in front → in front of

7.on → from

8.carefully → careful

9.to have to →  having to 

10.to come → coming

11.to open → opening

12.to learning → to learn

13.preferred → prefer

14.to make → making

15.are → is

I.

1.C

2.B

3.A

4.B

5.C

6.B

7.C

8.A

9.C

10.B

12 bakery

13 careful

14 pollution

15 Japanese

16 addictive

17 socializing

18 excited 

19 relaxing

Exercises I

1 are => is

2 staying => to stay

3 too many => too much

4 relaxed => relaxing

5 sound  => sounds

6 in front => in front of

7 on => from

8 carefully => careful

9 to have to =>  having to 

10 to come =>  coming

11 to open => opening

12 to learning => to learn

13 preferred => prefer

14 to make => making

15 are → is

Exercises I

1- C

2- B

3- A

4- B

5- C

6- B

7- C

8- A

9- C

10- B

                                cho mình câu trả lời hay nhất với ạ