to his scientific research, the professor cared little about his family.

 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

A brilliant idea occurred to him, ___ to his research in the lab.

A. while devoting                        B. while devoting himself

C. while he was devoted                   D. while devoted

The idea for the new machine came to Mr. Baker ______ to his invention recently.

   A. while devoting  B. while devoted 

C. while he was devoted   D. while devoting himself.

 _______ to the discovery of radium, Madame Curie plays an important role in modern

science.