His ______ brain and boundless energy drove him from one great invention to another.A．rich

Fish is a good brain food ______ it is good muscle food and skin food and bone food.

His ______ brain has worked away on the idea of a universal cure.A．richB．quickC．productive

Choosing foods that______your body and brain can help prevent or delay diseases.A．nurseB．t

His ______ brain has worked away on the idea of a universal cure.[2006]A．richB．quickC．prod

His______ brain has worked away on the idea of a universal cure. （2006年考试真题）A．richB．q

Brain drain occurs when more and more talented people______.A．move to developing countries