Seven from ten leaves three.
10减7得3。
We started German in year seven.
我们在七年级开始学习德语。
There are three bars, with live entertainment seven nights a week.
有三个酒吧每周七个晚上都有现场文艺节目。
She anchored the evening news for seven years.
她主持了七年晚间新闻报道。
You're early! I wasn't expecting you till seven.
你来得真早！我还以为你七点钟才到呢。