_exciting songs they sang at the concert last weeka what b what a_英语解答

_exciting songs they sang at the concert last week
a what b what an c how d what a

人气：276 ℃　时间：2020-01-29 21:09:23

解答

a为什么解释一下怎么是a呢songs是复数啊。不能用a，an