After a month of training, he became ____ to the work as a high-speed maglev train driver.

A. addicted　 B. sensitive　　 C. loyal　 D. equal

After a month of training，he became _______ to the work as a high-speed maglev train driver．

1. A.
   addicted
2. B.
   sensitive
3. C.
   loyal
4. D.
   equal