Could _ have been _ who helped Sunny get her work done?A.they ,it B.they ,them C.it,them D.it,they 答案是 D为啥?

分类: 作业答案 • 2021-12-20 03:26:25

问题描述：

Could _ have been _ who helped Sunny get her work done?
A.they ,it
B.they ,them
C.it,them
D.it,they
答案是 D
为啥?

答

对强调句It is they who have helped sunny get her work done.中主语they 的提问