```Instruction: In the following passage, the numbered gaps indicate missing words. Against each number in the list below each passage, four chances are offered in columns lettered A to D, For each question, choose the word that is the most suitable to fill the numbered gap in the passage.
When Bolingo lost his father while he was only a three-year old boy, he had thought that he had the world before him because as a little child, he could not ...6... between life and death. His mother, on whose ...7... the burden of bringing up Bolingo, an only son, and three of his younger siblings fell, had borne the cross ...8... since the demise of her husband. So, it was a welcome relief to her when Bolingo secured a ...9... job after a long search having graduated from one of the best universities in Nigeria several years ago. "After all", his mother had happily ...10... . "he would assist me to see his younger ones through their educational needs". Besides the ...11... she had been subjected to by her ...12... over her son's inability to secure a job, however ...13..., since he graduated from the university would become a thing of the past.
Regrettably, her joy was short lived. On the day when Bolingo would have started work at his desk, he got to his office just a few minutes past nine o' clock while he ought to have been there at 7:30am. He saw that the secretary whom he had come in contact with for the first time, as a fellow ...14... on the day he had submitted his application for employment had already seated herself at her desk and was ...15... in her work.```

• A.beneficial
• B.money-making
• C.productive
• D.lucrative