大全832 大全845(补充-186)

E 832.        The supply of oil being finite has become an economical and political consideration of the first magnitude for all modern industrial nations.

(A) The supply of oil being finite has become an economical

(B) The finite supply of oil has become an economical

(C) That the supply of oil is finite has become an economical

(D) The supply of oil being finite has become an economic（E）

(E) That the supply of oil is finite has become an economic

(A) that had been built by private industry and

(B) built by private industry and which was

(C) to be built by private industry and which was

(D) built by private industry and（D）

(E) to have been built by private industry and was

can somebody help me to explain the answer ???

Thanks~

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