do nothing but do there is nothing to do but do/to do用哪个?举例说明.它与nothing but有什么区别

题目

do nothing but do there is nothing to do but do/to do用哪个?举例说明.它与nothing but有什么区别

答案

there is nothing we could do but keep on waiting.
nothing but (something) means 'only that something', for example, nothing but answer A is correct, meaning only answer A is correct.
they are almost the same, just how u construct the sentence.