Choose A, B, C, or D on your answer sheet to indicate the word or phrase CLOSEST in meaning to the underlined part in each of the following questions.
Biogas can be utilized for electricity production, cooking, space heating, water heating, and process heating.
A. reformation
B. sparing
C. increase
D. generation
Đáp án D
production = generation : (điện học) sự phát điện
Các đáp án khác: reformation: đổi mới; increase: tăng; sparing: tiết kiệm