题干
Cathy has such a good that she won many prizes in singing competitions last year.
A：sleep
B：idea
C：voice
D：time
答案(点此获取答案解析）
C
Cathy has such a good that she won many prizes in singing competitions last year.
A：sleep
B：idea
C：voice
D：time
中，
，则角A等于 （ ）