The policemen_____ the thief when the accident happened.
— Listen! ______ beautiful music Lang Lang is playing! —He is such a wonderful pianist!
—Why are you in such a hurry, Anna? —Because I can’t find my schoolbag _______.
They saw the math teacher ______ the classroom just now.
— How long has Bob ______? — Since 2012.
—Why did Mike ______ the chance of studying abroad last year? — Because he had to look after his sick father.