In the survey they listed twelve kinds of food _______would affect the work of the brain．

       A．which the experts believed                 B．that were believed

       C．the experts believed that                          D．the experts believed

In the survey they listed twelve kinds of food _______would affect the work of the brain．

1. A.
   which the experts believed
2. B.
   that were believed
3. C.
   the experts believed that
4. D.
   the experts believed

In the survey they listed twelve kinds of food _______would affect the work of the brain．

       A．which the experts believed                 B．that were believed

       C．the experts believed that                          D．the experts believed

In the survey they listed twelve kinds of food ___would affect the work of the brain．

A．that were believed                             B．which the experts believed

C．the experts believed that                          D．the experts believed

In the survey they listed twelve kinds of food _______would affect the work of the brain．