—Someone is singing next door. Is it Amy?—It ______ be her. She is giving a performance at the theatre now.
Do you know the man who _________on the road just now?
Johnny ran very fast _________he could catch the early bus.
The Spring Festival __________ in January or February.
— __________ will the meeting start? —In about ten minutes, I think.
I ________ my hometown for a long time. I really miss it!