1. Competitors

2.Harmonic

3.Commemorates

4.Artistic

5.Surpiciously

6 Independant

7.Objection

8.Unpleasant

9.Talkative

10.Improvements

11.Refreshment

12.Unproductive

13. Knowledgeable

14.Broadcast

A.

1.can to => can

2.has => have

3.can => bỏ

4.to => bỏ

5.bought => buy

6.to do >= have done

7.ought => ought to

8.shouln't to => shouln't

B,C dễ lắm nên tự làm nhé :)))

3.B

4.D

5.C

6.A

7.C

8.A