she could___you with your business,but she didn't because she had an important meeting.A.help B.have helped C.be helping D.have been helping

she could___you with your business,but she didn't because she had an important meeting.A.help B.have helped C.be helping D.have been helping
she could___you with your business,but she didn't because she had an important meeting.
A.help B.have helped C.be helping D.have been helping

she could___you with your business,but she didn't because she had an important meeting.A.help B.have helped C.be helping D.have been helping
B 对过去的虚拟语气
有不明白的地方再问哟,祝你学习进步,更上一层楼! (*^__^*)