【单选题】He said it was impossible for______ a mistake in a computer' s calculation, so you can rely on that.
A.there being
B.there would be
C.there to be
D.there was
【单选题】He said it was impossible for______ a mistake in a computer' s calculation, so you can rely on that.
A.there being
B.there would be
C.there to be
D.there was
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