When _______how a statue from distant Greece could have appeared in China, researchers explained that no doubt this was a result of Alexander the Great’s influence.

Jenny is not coining for the party tonight. — But she !

_______ the website of the Five Departmentin your city, and you will learn a lot about firefighting.

We _____ have proved great adventurers, but we have done the greatest march ever made in the past ten years. [ ]

Bob often _______ two hours ________ his homework.