19. Which of the following exclamations is INCORRECT? ( )

50、I've never been to Lhasa. but that's the city( ).

49、There ought to be less anxiety over the perceived risk of mountain climbing than( ) in the public mind today.

48、It is not so much the language( )the cultural background that makes the book difficult to understand.

47、Fat cannot change into muscle( )muscle changes into fat.

46、Professor Johnson is said( )some significant advance in his research in the past year.

45、The three men tried many times to sneak across the border into the neighboring country,( )by the police each time.

44.After( )seemed an endless wait, it was her turn to enter the personnel manager's office.

68、Yesterday my aunt bought some new( )for her flat at the seaside.

67、The scheme was( )when it was discovered it would be very costly.

66、Although I spoke to her about the matter several times, she took little( )of what I said.