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【題目】I ______ very hard on English since I came to another school three years ago.

A. have worked B. worked C. work D. are working

【答案】A

【解析】句意:自從我三年前來到另一所學(xué)校以來,我一直在努力學(xué)習(xí)英語。since I came to another school three years ago表示的是截止到目前為止的時間段,用于現(xiàn)在完成時態(tài)的句子中,故答案為A。

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