11.他們已經(jīng)選定了一首歌參加學(xué)校的歌唱比賽.
They havedecidedonthe song to take part in the school singing competition.

分析 decided on

解答 答案:decided on.表達的動作發(fā)生在過去,對現(xiàn)在造成一定的影響,故用現(xiàn)在完成時have/has+過去分詞,decide on決定…,故答案是decided on

點評 現(xiàn)在完成時有兩種用法1.過去發(fā)生的某一動作對現(xiàn)在造成的影響或結(jié)果或到現(xiàn)在為止已經(jīng)發(fā)生或完成的動作.2.表示過去發(fā)生的、持續(xù)到現(xiàn)在的動作或狀態(tài).

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