问题
选择题
He is said _______ a new machine recently, but I don’t know when he will make it.
A．to design
B．to be designed
C．to have designed
D．to have been designing
答案
答案：D
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He is said _______ a new machine recently, but I don’t know when he will make it.
A．to design
B．to be designed
C．to have designed
D．to have been designing
答案：D
