----That’s a heavy box. Can I give you a hand?----. I’m strong enough to carry it.A. Yes

问题补充：

----That’s a heavy box. Can I give you a hand?

----. I’m strong enough to carry it.

A. Yes, you could

B. Sure

C. No, thanks

D. No, never mind

答案：

A. Yes, you could

B. Sure

(答案→)C. No, thanks

D. No, never mind

解析：考查交际用语的用法。Yes, you could是的，你能；Sure当然了； No, thanks 不，谢谢；No, never mind不，不要介意。句意：那是很重的箱子。要我帮你一把吗？结合下文，我足够强壮搬动他。可知选C，最符合语境。

后者自己能做，不需要帮忙，所以要婉言谢绝。