单选题 ______ the advances of scientific forecasting, in spite of the thousands of daily bulletins and advisories that get flashed about, the weather is still ultimately capricious and unpredictable.
【正确答案】 A
【答案解析】此题考查介词短语的用法。解题关键：根据题意确定该部分应作让步状语。A项for all意为“尽管；虽然”，这一介词短语作让步状语，符合题意。B项but for意为“要不是；若非”，常作为暗含条件，用在虚拟语气的句子里。C项as for和D项as to都有“关于；至于”之意，前者有时暗含轻视之意。