下面四个英语句子有两个各有一处错误,请帮我找出来并改正.
问题描述：
下面四个英语句子有两个各有一处错误,请帮我找出来并改正.
Rooms will be cleared in the late morning.
Visitors will allowed to stay in the building after 9pm.
Doctors will be waited 24 hours a day.
All competitors will be expected to behave politely to each other.
答
1,将wil be改成was.
2,将allowed改成allow.
3,将will be 改成 were.
4,将be expected to 改成remain