It was in Beihai Park____they make a date for the first time

題目：

It was in Beihai Park____they make a date for the first time____the old couple told us their love story.
where；that請詳細解釋一下

解答：

they make a date for the first time in Beihai Park
所以where做地點狀語
It was ...that...是強調句（固定搭配）