题目

(2018·全国卷Ⅰ)You don't have to run fast or for long ________ (see) the benefit. 答案：to see 句意：为了证实跑步的好处，你不必跑得太快或者太久。用不定式作目的状语。命题“同位角相等，两直线平行”中，题设是           ，结论是           ．