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题目内容
（甘肃开放大学 英语阅读1）
Had we known your specific requirements, we _______ you a firm offer.
A.
will fax
B.
fax
C.
have faxed
D.
would have faxed
A.
will fax
B.
fax
C.
have faxed
D.
would have faxed
参考答案