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【題目】We ____________ trees last Sunday. So far we __________ over 3,000 trees there.

A. planted; planted B. planted; have planted

C. have planted; planted D. have planted; have planted

【答案】B

【解析】句意:上周日我們種樹了。到目前為止我們已經種了3000棵樹。根據時間狀語last Sunday可知用一般過去時態(tài),plant的過去式是plant。根據時間狀語So far可知用現(xiàn)在完成時,其結構是have done的形式。根據題意,故選B。

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