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.

65、The( ) physicist has been challenged by others in his field.

64、Half the excuses she gives are not true, but she always seems to ( ) them.

63、Hotel rooms must be ( ) by noon, but luggage may be left with the porter.

62、Very few scientists ( ) with completely new answers to the world's problems.

61、The main road through Littlebury was blocked for three hours today after an accident ( )two lorries.

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

59、When there was a short( )in the conversation, I asked if anyone would like anything to drink.

58、He must give us more time,( )we shall not be able to make a good job of it.