[A] precisely instantly [c] initially D] exclusively 28. The introduction of gunpowder gradually made the bow and arrow particularly in Western Europe obsolete [C] optional [D] overlapping 29. Whoever formulated the theory of the origin of the universe, it is and needs proving [A] spontaneous hypothetic [C intuitive [D] empirical 30. The future of this company is many of its talented employees are flowing into more profitable net-based businesses [A]at odds in trouble [c] in vain [D] at stake[A] precisely instantly [C] initially [D] exclusively 28. The introduction of gunpowder gradually made the bow and arrow ________, particularly in Western Europe. [A] obscure obsolete [C] optional [D] overlapping 29. Whoever formulated the theory of the origin of the universe, it is just ________ and needs proving. [A] spontaneous hypothetical [C] intuitive [D] empirical 30. The future of this company is ________: many of its talented employees are flowing into more profitable net-based businesses. [A] at odds in trouble [C] in vain [D] at stake