I'm _________(惭愧的）to have behaved so badly at your party.
Believe it or not, I met a s______ football star this morning on the street.
Each ______(国籍) has its own national features which should be respected.
Then came the ______(令人不安的) news that Dolly had become seriously ill.
A protein within that g______ acts a lot like wheat protein.
Do as I tell you, or you’ll r______ it later on.