Mary， Who’s ______ woman over there –She’s my aunt， ______ English teacher.

_________ since we last saw our primary school classmates.

下列各句中画线的“以”的意义和用法，与例句中的“以”相同的一项是（ ）例：以子之道，移之官理

ndhalf hours ofdiscussion took us up to midnight,andbreak forcheese,chocolate and tea with sugar

Every possible means ______ to prevent the air pollution, but the sky is still not clear.