47. In the dark it was hard for us to _____ resign unless he received an increase in salary.
A) make for
B) make out
C) make sure
D) make up
48. The manager _____ to resign unless he received an increase in salary.
A) promised
B) announced
C) threatened
D) preferred
49. The city planted trees at short _____ along the streets.
A) distances
B) spaces
C) intervals
D) pauses
50. The article appeared in the fourth _____ of the magazine.
A) edition
B) issue
C) version
D) print
51. You can _____ a fortune by regularly saving money.
A) come up
B) build up
C) bring up
D) add up
52. I don't know if the story is true but I will try to _____ it.
A) conform
B) prove
C) identify
D) verify