With the Internet use ______ in the world, companies like Yahoo and Google are hunting harder for deals.

So far all cloned animals have suffered from some different serious disorders, ______ dying soon after birth.

Not far from the river is a house,____owner seated in it reading newspapers.

The frighten boy lay in bed quietly, with his eyes____ on the wall, saying nothing.

With a lot of difficult problems _________, the manager felt worried all the time.