All the citizens are taking actions to protect the environment, so our city is ___________ a clean and beautiful city.

    A. on the way becoming                   B. on the way become

    C. on the way to becoming               D. on the way to become

All the citizens are taking actions to protect the environment, so our city is ___________ a clean and beautiful city.

　 A. on the way becoming　　　　　　　　 B. on the way become

C. on the way to becoming D. on the way to become