Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

_______ in some environmental campaigns, we changed our attitude to nature.

A. Participated

B. Having participated

C. Have participated

D. Have been participated

Đáp án
B. Having participated

Câu hỏi thuộc Bài tập:

ĐỀ SỐ 6 - VŨ MAI PHƯƠNG