三、語文填空（21-35 題，請選出最適當的選項）
  Passage 1 
      The tropical boxfish, roughly the shape of a box, looks as if it would have trouble moving
through the water.   21   , the boxfish is in fact an excellent swimmer that cuts through the water
extremely smoothly. Ronald Fricke and his colleagues created a model which was placed inside a
wind tunnel, a   22     that was used to study how air moved around solid objects. Amazingly,
the boxfish shape reportedly performed over 65 percent better than today’s compact cars. It should
be possible to   23     an efficient shape for use in the body of a car to reduce its air resistance.
Less air resistance would mean less fuel required to run a car—something which is   24   to all
drivers in times of expensive fuel. Thus, engineers set to work to try to solve the    25  of how
this unlikely shape could be so efficient. Their efforts were rewarded, and the car they created
would be the Mercedes Bionic concept car.