Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
A.to design
B.to be designing
C.to have been designing
D.to have designed
答案:C
Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
A.to design
B.to be designing
C.to have been designing
D.to have designed
答案:C