54、( ) no cause for alarm, the old man went back to his bedroom.

56、The plane found the spot and hovered close enough to ( )that it was a car.

55、I felt that I was not yet( ) to travel abroad.

54、I was to have made a speech if( )

53、I have never been to London, but that is the city( )

52、It was as a physician that he represented himself, and ( ) he was warmly received.

51、Come and see me whenever( )

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.