Mark the letter A, B, C, or D to indicate the correct answer to each of the following sentences.

Câu hỏi

These smart technologies will help ________ energy, reduce air pollution, and fight climate change.

Đáp án
B. save

Câu hỏi thuộc Bài tập:

UNIT 3: CITIES OF THE FUTURE - VOCABULARY - Tiếng Anh 11 Global Success