根据句意,用括号内所给动词的适当形式填空。
1. You shouldn't have (leave) so soon at the party.
2. He is (suppose) to arrive at the station at 8:40.
3. They lay on the beach, (look) up into the blue sky.
4. Eating dumplings at the Spring Festival (be) the custom in our country.
5. I was very embarrassed at the party because I (wear) the wrong clothes.
