o you think of the price of these computers–They are at least equal in price to, if not cheaperthan, ____at the other companies

Why do you suggest we buy a new machine? — Because the old one has been damaged ___________．

Some of the animals ____ the pollution. —Right. The government will find ways to solve the problem.

Why are the housing prices in big cities going up all the time?——One reason is that people are__________ into overcrowded cities in great numbers.

Only when he returned home ______ what had happened.