Câu hỏi:
02/03/2024 51Biogas is ….. and cheap for cooking and heating.
A. serious
B. expensive
C. plenty
D. abundant
Trả lời:
![verified](https://1900.edu.vn/images/exam/verified.webp)
Đáp án đúng là: D
Dịch: Khí sinh học rất dồi dào và rẻ để đun nấu và sưởi ấm.
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