41. (A) chances are (B) working is (C) occurs as (D) pushes upon

49. How did Ben Underwood identify his surroundings? (A) Ben’s parents accompanied and made sounds for him in case of his falling down. (B) Ben and Murray took care of each other. (C) The medical team believed Ben was unable to live independently. (D) Ben found his way by producing sound waves that echo when they are reflected off an object.