He sat there_________, with his head on his hand.[ ]

Do you know where David is? I couldn’t find him anywhere. — Well. He _____ have gone far-his coat is still here. [ ]

The demand that the law on gun ownership _____ be changed ___ is very strong.

Too many hotels have been built and this has _____ prices, making holidays cheaper.

It is reported that the guy who is going to _________the lecture spent a year living in the rain forest.