to my great joy ,i passed the exam and got an "a" in it.为什么只能用joy而不能用enjoyment

to my great joy ,i passed the exam and got an "a" in it.为什么只能用joy而不能用enjoyment
to my great joy ,i passed the exam and got an "a" in it.为什么只能用joy而不能用enjoyment

to my great joy ,i passed the exam and got an "a" in it.为什么只能用joy而不能用enjoyment
joy 是高兴的事.enjoyment是喜欢,欣赏.
所以用joy,不用enjoyment.意思是“令我高兴的是.”类似地,to my surprise,to my delight,to my sorrow,to my sadness.

enjoyment 有享受的意思，joy是快乐的意思