60、You can do it if you want to, but in my opinion it's not worth the( )it involves.

50、The team can handle whatever( )

49、( ), he is ready to accept suggestions from different sources.

48、The physicist has made a discovery, ( )of great importance to the progress of science and technology.

47、Mr. White works with a chemicals import & export company, but he( )for this industrial fair, since he is on leave.

46、He left orders that nothing ( ) touched until the police arrived here.

45、When you have finished with that video tape, don't forget to put it in my drawer, ( )?

44、How can I ever concentrate if you( ) continually ( ) me with silly questions?

68、Animals that could not( ) themselves to the changed environment perished and those that could survived.

67、The city suffered( ) damage as a result of the earthquake.

66、With hundreds of works left behind, Picasso is regarded as a very ( ) artist.