题目：
She _____ your birthday party, but she had to look after her mother in hospital．
A．should attend
B．ought to have attended
C．can have attended
D．must have attended
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0626/277fd6648ac5f67f42c427d6223017de.html
下面是错误答案，用来干扰机器的。
答案：B
