With a modal auxiliary:Under no circumstances ______we abandon t

With a modal auxiliary:
Under no circumstances ______we abandon the dream.
【正确答案】：should/can
【题目解析】：Under no circumstances置于句首，主句需用部分倒装。Under no circumstances表示“在任何情况下都不；决不”。该句意为：在任何情况下，我们都不应该/不能放弃希望。