"What happens to what we throw away?" Many wonder.

A. Many wonder what happens to what we throw away.

B. Many wondered what happened to what we threw away.

C. Many wondered what has happened to what we threw away.

D. Many wonder what happened to what we threw away.

Đáp án
A. Many wonder what happens to what we throw away.

Câu hỏi thuộc Bài tập:

Bài tập Trắc nghiệm Tiếng Anh 10 - Unit 9: Protecting The Environment (Writing)