The warmth of___sweater will of course be determined by the sort of___wool used.
A.the; the B.the; / C./; the D./; /
The warmth of___sweater will of course be determined by the sort of___wool used.
A.the; the B.the; / C./; the D./; /
B
wool“羊毛”,为不可数名词,在此表示泛指,不与定冠词连用,故选项A、C均不对;sweater 在此表示“羊毛衫”这一类物品,与 the 或 a均可连用。