You shouldn’t have 　　　　　(leave) so soon at the party.
He is 　　　　　(suppose) to arrive at the station at 8:40.
They lay on the beach, 　　　　　(look) up into the blue sky.
Eating dumplings at the Spring Festival　　　　　(be) the custom in our country.
I was very embarrassed at the party because I 　　　　　(wear) the wrong clothes.