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

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.

57、Although the false banknotes fooled many people, they did not( )to close examination.

56、If he( )in that way for much longer he will find himself in the bankruptcy court.