[語文] 9102填空討論
下面這題是91年2月填空的題目：
2.Because many of the minerals found on the ocean
floor are still ------- on land, where mining is rela-
tively inexpensive, mining the ocean floor has yet to
become a ------- enterprise.
(A) scarce. . common
(B) accessible.. marginal
(C) unidentified.. subsidized
(D) conserved . . public
(E) plentiful.. profitable
答案是E，請教一下yet在此要如何解釋？
我一直覺得題目是不是少了"not"？
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