Choose the correct form of the word for the blanks: 11. Everyone was very___________________ after hearing that news.( excite) 12. She actively __________________ in social work (participation) 13 The telephone is one of the greatest ___________________ in the world (invent) 14. I’m ________ to hear you had a happy Mother's Day. (please) 15. the trip was ________________spent due to the bad weather (enjoy)

11.Everyone was very excited After hearing that news 

12.She actively participates in social work

13.Telephone is one of the greatest  inventions in the world

14. I’m pleased to hear you had a happy Mother's Day. 

15. the trip was enjoyed spent due to the bad weather 

Câu 12 : giải thích

Giải thích:

- Ở đây đang cần 1 động từ

- She là số ít nên chia động từ 

- Thì: Hiện tại đơn

- Dấu hiệu nhận biết: actively

- participates +in: tham gia

Có thể dịch: 

Cô ấy tích cực tham gia công tác xã hội.