We should participate in Tree-Planting Campaigns our city greener, fresher.

Đáp án C.

- organize to do sth: tổ chức, sắp xếp làm việc gì đó

Câu ở dạng đầy đủ phải là: “We should participate in in Tree-Planting Campaigns which/that are organized to make our city greener, fresher.

→ rút gọn mệnh đề quan hệ thành “… Tree-Planting Campaigns organized to make …”.

FOR REVIEW

Rút gọn mệnh đề Mệnh đề được rút gọn bằng các hình thức sau:

(1) To V  Ex: I have some work. I must do it tonight.→ I have some work to do tonight.

(2) V-ing

Ex: My mother felt tired. She went to bed early.→ Feeling tired, my mother went to bed early.

(3) V-PII

Ex: My school was formed 50 years ago. It is holding a big anniversary.→ Formed 50 years ago, my school is holding a big anniversary.

(4) Cụm giới từ

Ex: The man is in the house. He is my father.→ The man in the house is my father.