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4．Both China and Russia_________ from their growing business ties over the past four decades．（　�。�
A．had benefitedB．benefitC．benefitedD．have benefited

分析 句意：中國和俄羅斯都從過去40年來不斷發(fā)展壯大的商貿關系中獲益良多．

解答 答案D．根據(jù)時間狀語over/in the past/last+段時間，用現(xiàn)在完成時．故選D．"had done"表示過去的過去，過去有兩個動作，先發(fā)生的動作用過去完成時，后發(fā)生的用一般過去時．

點評 本題考查時態(tài)，要區(qū)分不同時態(tài)的用法并結合具體的語境選擇出正確的選項．

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