28._____it was once a heavily-polluted rice field, it is now much cleaner.
(A) Because
(B) Whenever
(C) However
(D) Although
詳解 (共 5 筆)
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______it was once a ...
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heavily-polluted 嚴重汙...
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Although it was once...
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補充:although, though,...
私人筆記 (共 1 筆)
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althoughconjunctionU...