Question

【题目】—Do you consider worthwhile for them to have made that experiment?
— Of course. After all, it has paid off.

Answer 1

【答案】it
【解析】句意:——“你认为他们做那个试验值得吗?” ——“当然了。毕竟，他们得到了回报。”it is worthwhile for sb to do sth“某人做某事是值得的”,是固定用法，答案为it。