What does the passage mainly discuss?
Câu hỏi
Nhận biếtWhat does the passage mainly discuss?
Đáp án đúng: D
Lời giải của Tự Học 365
Giải chi tiết:
Đáp án là D. Topic sentence : Iron production was revolutionized in the early eighteenth century when coke was first used instead of charcoal for refining iron ore.
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