D
用 be sorry to do 结构
__________________ that the experiment has not been a success
__________________ that the experiment has not been a success
A.I am sorry saying
B.I am sorry to saying
C.I sorry to say
D.I am sorry to say
A.I am sorry saying
B.I am sorry to saying
C.I sorry to say
D.I am sorry to say
英语人气：422 ℃时间：2020-01-27 06:16:48
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