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