48. Although I spoke to him many times, he never took any _____ of what I said.
A) notice
B) attention
C) consideration
D) warning
49. It is no easy thing to _____ the meaning of every idiom in English.
A) get by
B) get in
C) get on
D) get at
50. The book only _____ the causes of the war and does not do justice to the influence of the slave trade.
A) counts on
B) touches on
C) takes on
D) pulls on
51. We must take a firm _____ against the lowering of educational standards.
A) stand
B) place
C) position
D) reason
52. It never _____ my mind that he might refuse the request.
A) passed
B) filled
C) crossed
D) occurred
53. At the sight of the police officer, the thief _____.
A) got to his feet
B) took to his heels
C) rose to his feet
D) dragged his heels
54. The guide told us that an incident _____ here in 1925.
A) took place
B) was taking place
C) had been taking place
D) had taken place