41. The passage is mainly about _____
(A) the shortage of fossil fuel.
(B) the problems that energy researchers are facing.
(C) solar energy.
(D) inexpensive energy sources.
詳解 (共 3 筆)
未解鎖
Because of the energ...
未解鎖
The passage is mainl...
未解鎖
Because of the energ...
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