_______, tobacco farmers had not yet felt its effect.

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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Though a campaign against smoking

That there was a campaign against smoking

Even though there was a campaign against smoking

There was a campaign against smoking

Giải thích

Chọn C

Dịch: _____, những người trồng thuốc lá vẫn chưa thấy ảnh hưởng của nó. -> mệnh đề chỉ sự trái ngược -> (even) though+ S + V -> chỉ có đáp án C là đúng cấu trúc.