题目内容:
WhydoesAmericarelyheavilyonoffimports?
A.Itwantstoexpanditsstorageofcrudeoil. B.Itsownoilreservesarequicklyrunningout.
C.Itwantstokeepitsownenvironmentintact.
D.Itsownoilproductionfallsshortofdemand.
参考答案:
答案解析: