The computer system____ suddenly while he was searching for information on the Internet.

Animals that could not ____ themselves to the changed environment died and those that could survived.   

——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.

—Didn't you have a good time at the party?—Of course I did.As a matter of fact，I had such fun that time seemed to ______ so quickly.

In his spare time, he often listens to music or watches TV to          himself.