20. If I _______ you needed help, I would have given you a hand.
(A)have known
(B)had known
(C) were known
(D)would known

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詳解 (共 1 筆)

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題目解析 這道題目考察的是虛擬語氣的用...
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私人筆記 (共 1 筆)

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正確答案：(B) had known翻譯...
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