Seven from ten leaves three.

　　10減7得3。

　　We started German in year seven.

　　我們?cè)谄吣昙?jí)開(kāi)始學(xué)習(xí)德語(yǔ)。

　　There are three bars, with live entertainment seven nights a week.

　　有三個(gè)酒吧每周七個(gè)晚上都有現(xiàn)場(chǎng)文藝節(jié)目。

　　She anchored the evening news for seven years.

　　她主持了七年晚間新聞報(bào)道。

　　You're early! I wasn't expecting you till seven.

　　你來(lái)得真早！我還以為你七點(diǎn)鐘才到呢。