Andrew is said ________ a new puter programme last month, but I don't know when she will finish it．A.to designB.to be designingC.to have designedD.to have been designing
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B解析考查非谓语动词．根据but I don't know when she will finish it这一分句可知，此处应用不定式的进行式，表示Andrew正在设计一项新的电脑程序．