What a pity! I ______in Hainan two more
题型：选择题
问题：
What a pity! I ______in Hainan two more days，but something urgent needed to be dealt with back home.
A．must have stayed
B．needn't have stayed
C．may have stayed
D．could have stayed
What a pity! I ______in Hainan two more days，but something urgent needed to be dealt with back home.
A．must have stayed
B．needn't have stayed
C．may have stayed
D．could have stayed