A college student had stayed up all night, _______ for his test the next day.
--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.
When he was ten, Edison ___ a small lab of his own.
The trains___ the travellers who want to go to other places.