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

Fossil fuels are ___energy sources.

A. Solar

B. renewable

C. non-renewable

D. wind

Đáp án
C. non-renewable

Câu hỏi thuộc Bài tập:

UNIT 10: ENERGY SOURCES TEST 02