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(2013·甘肃诊断测试)Your cousin is said ________ a new computer program recently, but do you know when he w...
题目内容：
(2013·甘肃诊断测试)Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
A．to design B．designing
C．to have been designing D．to have designed
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