问pp2里的一道三空题

loly_heUID: 3242491

Higher energy prices would have many (i) ______ effects on society as a whole. Besides encouraging consumers to be more (ii) ______ in their use of gasoline, they would encourage the development of renewable alternative energy sources that are not (iii) ______ at current prices.

BLANK (i)	BLANK (ii)	BLANK (iii)
(A) pernicious	(D) aggressive	(G) unstable
(B) counterintuitive	(E) predictable	(H) adaptable
(C) salubrious	(F) sparing	(I) viable

答案是CFI,句意我是理解了，可是第三空里H和I有什么区别？为什么不能选adaptable?

wsjandzjjUID: 3002956

答案是CFI吧

adaptable
adj.
1. capable of being adapted.
2. able to adjust oneself readily to different conditions: an adaptable person.
viable
5. practicable; workable: a viable alternative.

多查查韦氏吧。

loly_heUID: 3242491

2# wsjandzjj

还是不明白。。。。5. practicable; workable: a viable alternative. 的话，不是说明它和viable是一个意思么？为什么一个能选一个不能选呢？

咖啡盐UID: 2973669

adaptable后接只能是to，没有其他的

loly_heUID: 3242491

4# 咖啡盐
原来是这样，谢谢~

tjuligenUID: 3260233

adaptable 又不是 adoptable. 明显要选择“不可行，无法接受”的意群