—Jack could I use your bike？I need to go to the market this afternoon.—！I won't use it.A.

问题补充：

—Jack，could I use your bike？I need to go to the market this afternoon.

—！I won use it.

A. Take it easy

B. Don mention it

C. Go ahead

D. Its up to you

答案：

A. Take it easy

B. Don mention it

(答案→)C. Go ahead

D. Its up to you

解析：句意：——杰克,我可以用你的自行车吗?今天下午我需要去市场。——用吧!我不用它。Take it easy别紧张；Don mention it 不用介意，别放在心上；Go ahead用吧，继续；Its up to you 取决于你。根据I won use it.（我不用）可知，杰克让对方使用他的自行车。故选C。