请教SC大全，补充250题的第8，15，48题

先谢了

第8题中的D里的they是否存在指代不清的问题？E中的would又是否可以视为与could保持同形的时态变化？ 我觉得D中的they有指代不清之嫌，那么effective原则，因改选D还是E呢？

第15题中，为什么说C中的which has不对呢？ 我觉得C/D中的which都似乎有正确的指代啊？！

第48题中的C，加入了but，请问怎么理解？？

谢谢

8. A majority of the international journalists surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future.
(A) that they will, or could,
(B) that they would, or could
(C) they will be or could,
(D) think that they will be or could
(E) think the power stations would or could

15. Acid rain and snow result from the chemical reactions between industrial emissions of sulfur dioxide and nitrogen oxides with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.
(A) with atmospheric water vapor to produce highly corrosive sulfuric and nitric acids
(B) with atmospheric water vapor producing highly corrosive sulfuric and nitric acids
(C) and atmospheric water vapor which has produced highly corrosive sulfuric and nitric acids

48. From 1965 on, Yugoslavia’s standard of living has soared, but unemployment and prices too.
(A) but unemployment and prices too
(B) and also unemployment and prices
(C) but so have unemployment and prices
(D) and so also unemployment and prices
(E) but so did unemployment and prices
(D) and atmospheric water vapor which have produced sulfuric and nitric acids which are highly corrosive
(E) and atmospheric water vapor to produce highly corrosive sulfuric and nitric acids  正确判断between…and的and的位置！

第8题是选E 吗，我觉得要考虑两点：1 they的指代问题 2 would could时态一致性问题

第15题，C中的which是指代vapor,根据题意应指代reactions.

第48题，生活水平的上浮和物价、失业率的上涨应该是反向对比的，所以用but

谢谢解答，我也觉得第八题应该选E，不过大案是D阿～～

我就是觉得D中的they指代存在问题～

第8题，考think 后面要接that(虽然有时可不接，但这里是划线部分，正规用法是必须用that的)，will be 要比would 用得好，因为E中would 与could 意思有点重复感

as to they ,from grammar  they could refer to the majority of international journalists or to the nuclear power stations,but from logical we can exclude the journalists