Our offer ________ 30,000 tons of corn is valid for 10 days.

Our offer ________ 30,000 tons of corn is valid for 10 days.
A、to
B、after
C、for
D、on
【正确答案】：C
【题目解析】：句意：我们对30 000吨玉米的报价有效期是10天。offer for表示“对报价”