判断以下英语句子的正误,说明原因.
1.They wii arrive in Beijing on the morning.
2.It's hot in the room,plesse keep the door open.
3.Which bus does he need to take?
4.The glass is full of hot water.
5.We needn't to go to school on May 1st.
6.He went to the party without inviting.
第一个应是They will arrive in Beijing on the morning of March 5th.