20．In the last few years，China__________ great achievements in environmental protection．（　�。�
A．has madeB．had madeC．was makingD．is making

分析 在過去的幾年里，中國在環(huán)保方面取得了很大的成就．

解答 答案：A．
由題干中的時間短語 in the last few years可知，謂語動作從過去開始并持續(xù)到現(xiàn)在且對現(xiàn)在產(chǎn)生了影響，所以謂語動詞用現(xiàn)在完成式，故選A．
B選項表示在過去某一時刻或動作以前完成了的動作，即"過去的過去"；C選項表示在過去某一時刻或某一段時間內(nèi)正在進行或發(fā)生的動作；D選項表示正在進行的動作或存在的狀態(tài)；

點評 此題考查現(xiàn)在完成式．現(xiàn)在完成式有兩種用法：①表示過去發(fā)生的動作對現(xiàn)在造成的影響或結(jié)果 ②表示過去的動作或狀態(tài)持續(xù)到現(xiàn)在．現(xiàn)在完成式的構(gòu)成：has/have done．現(xiàn)在完成式的標(biāo)志詞有 already，yet，ever，recently，so far，until now，up to now，since+點時間，for+短時間，in the last/past+段時間 等等．解題時應(yīng)根據(jù)句意抓住時間標(biāo)志詞．

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