before与ago的选词填空have you been to London---,Tony?yas,I went two year----.

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before与ago的选词填空have you been to London---,Tony?yas,I went two year----.

before与ago的选词填空have you been to London---,Tony?yas,I went two year----.
before与ago的选词填空
have you been to London---,Tony?
yas,I went two year----.

before与ago的选词填空have you been to London---,Tony?yas,I went two year----.
第一个before
第二个ago
before多用于完成时
ago用于一般过去式

before
ago

before 以前,介词
ago 用在时间后,表示多少时间以前。