46. _____ there's a good reason for her absence, as she doesn't usually stay away from work.

　　A) Currently

　　B) Presumably

　　C) Seemingly

　　D) Decidedly

　　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