Agree with LZ!选C.下面是搜到的原文(Not Always Nice - glacier research Discover, June, 1999 by Richard Woodley)的最后一段,highlight出来的部分可以看出选项C基本上就是用or else来替换otherwise,so reflective前省略is。有的人可能会说原文也不一定正确啊。但是B里面were it to do so真的是指代得太不清了,而A so...so that..也不对。反正排除其它选项后还是C最优啦。 Pure ice is transparent, but the air bubbles in fresh snow reflect light, a fact that is essential to life as we know it. Antarctica receives more sun radiation than anywhere else on Earth, yet the temperatures are so cold and the ice cap so reflective that minimal ice melt occurs each summer. Otherwise, the water levels of the oceans would rise by 250 feet and engulf most of the world's great cities. |