那是因为他努力学习,所以赢得了比赛.It __ __ he practiced hard __ he won the match

题目

那是因为他努力学习,所以赢得了比赛.It __ __ he practiced hard __ he won the match
根据汉语意思完成句子（每空一词）

答案

was because; that
过去时+it is because...that...句型