My mother spent half___hour finishing making___cake.A.a,a B.an,an C.an,the D.the,a求求你们啦

Question

My mother spent half___hour finishing making___cake.A.a,a B.an,an C.an,the D.the,a
求求你们啦

Answer 1

选C.cake有所指.
意思是：妈妈花了半小时的时间制作了这块蛋糕.