20．---I expect the children will have a wonderful performance at tomorrow's party．
---So do I．They ________ hard in the past two weeks．（　�。�
A．practisedB．had practised
C．have been practisingD．will practise

分析 --我盼著在明天的晚會上，孩子們將有一場精彩的演出．
--我也是如此．在過去的兩周里他們一直在進(jìn)行健康的練習(xí)．

解答 答案：C．根據(jù)I expect the children will have a wonderful performance at tomorrow's party可知演出還沒有進(jìn)行，又根據(jù)時間狀語in the past two weeks可知他們的練習(xí)從過去開始，一直持續(xù)到現(xiàn)在而且現(xiàn)在還在進(jìn)行，所以答案是C．D項是根據(jù)完成時．

點評 考查現(xiàn)在完成進(jìn)行時．
So do I的用法
該結(jié)構(gòu)主要用來說明前面所說的情況也同樣適用于后面的人或物，[意為"…也一樣"]．該結(jié)構(gòu)中的助動詞 do 根據(jù)前文的情況也可換成 is，am，are，was，were，does，did，can，could 等．如：
He passed the exam，and so did I．
=He passed the exam，and I passed the exam，too．
=Both he and I passed the exam．
=He and I both passed the exam．
他通過了考試，我也通過了考試．/他和我都通過了考試．

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