GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 3S2_X8277352Z7J6A

No one (i)____________ that building a ship powered by black holes or dark matter would be a formidable task. Yet remarkably there seems to be nothing in our present understanding of physics that (ii)____________ our doing so. A. believes B. anticipates C. admits D. necessitates E. disputes F. precludes