___in the arguments about the morality of artificially reproducing life is the fact that,at present, cloning is a very inefficient procedure.(本题1.5分) A、 Overlooked B、 Overlooking C、 Having overlooked D、 Having been overlooked

___in the arguments about the morality of artificially reproducing life is the fact that,at present, cloning is a very inefficient procedure.(本题1.5分)
A、 Overlooked
B、 Overlooking
C、 Having overlooked
D、 Having been overlooked

出自：镇江高等专科学校大学英语

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