Mr Li,I found a watch on the playground .--You should try to find out ________.A.Who is the owner of the watchB.who the owner of the watch is我什么不能选B

问题描述:

Mr Li,I found a watch on the playground .--You should try to find out ________.
A.Who is the owner of the watch
B.who the owner of the watch is
我什么不能选B

这是个定语从句,从句部分要用主谓结构.who 就是 主语 iS 是谓语 后面的是宾语.