I’ve worked with children before, so I know what _____ in my new job.
He was __ twenty when he was gone.
The girl ___ in front of me kept laughing and crying.
--Do you hear a fire ___ last night?---Yes, it __ by the firemen in no time.
What he said sounds ___.
--What’s ___ at the theatre this evening ?---It's ____ Comrade Leifeng.