Bộ 3 Đề kiểm tra Unit 6 - Tiếng anh 10 iLearn Smart World có đáp án (Đề 1)

When did someone invent the radio? → When was.............................

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Rewrite the following sentences without changing their meaning. Use the given word(s) if any

When did someone invent the radio?

→ When was.............................

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Giải thích

the radio invented?