Someone who performs a comedy act on their own

问题描述:

Someone who performs a comedy act on their own
为什么不是his 或者her 而是their这个不是指代的 他们的 的意思吗

能自己单独表演喜剧的人.
1.Someone who performs a comedy act on their own is known as a __________ comedian.
A.sit-down B.stand-up
C.lie-down D.bad
选B