It was_______ weather that we had to stay at home A such badB such a badC so badD so bad a答案为Aweather 是不可数名词，不能用a. 不能选B\D such + a/an adj.+n(可数名词单数).such a cold daysuch +adj.+n.（不可数名词）
suchcold weathersuch +adj.+n（可数名词复数）.such nice applesso adj.( a/an +n.) so cold a day
