Seven from ten leaves three.
10減7得3。
We started German in year seven.
我們在七年級開始學習德語。
There are three bars, with live entertainment seven nights a week.
有三個酒吧每周七個晚上都有現場文藝節目。
She anchored the evening news for seven years.
她主持了七年晚間新聞報道。
You're early! I wasn't expecting you till seven.
你來得真早！我還以為你七點鐘才到呢。