Question: optimum control of air direction, quantity and velocity
Answer: --> Optimum control of air direction, quantity and velocity

Question: a buffet breakfast is served every morning in the breakfast room with a retractable roof.
Answer: --> A buffet breakfast is served every morning in the breakfast room with a retractable roof.

Question: radiation for treatment of nodes of cosmetic concern, article #7, p. 35-36
Answer:
--> Radiation for treatment of nodes of cosmetic concern, Article #7, p. 35-36