Fill in the blanks with the following expressions.This offer is（）your reply reaching us within 5 days.
A.on the basis of
B.without any delay
C.subject to
D.prompt
E.under separate cover
正確答案：subject to
題目：Fill in the blanks with the following expressions.This offer is（）your reply reaching us within 5 days.
關鍵字：智慧樹
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