The idea for the new plan came to his mind, ______ to his experiment in the lab.

A. while devoting                                             B. while devoting himself 

C. while he was devoted                                    D. while devoted

The idea for the new plan came to his mind,         to his experiment in the lab.

1. A.
   while devoting
2. B.
   while devoting himself
3. C.
   while he was devoted
4. D.
   while devoted

The idea for the new plan came to his mind,         to his experiment in the lab.

       A．while devoting                                           B．while devoting himself

       C．while he was devoted                                  D．while devoted

The idea for the new plan came to his mind, ________to his experiment in the lab.

       A．while devoting        B．while devoting himself

       C．while he was devoted      D．while devoted

 The idea for the new plan came to his mind,         to his experiment in the lab.

       A．while devoting        B．while devoting himself

       C．while he was devoted      D．while devoted