The cause he had devoted himself to __________a perfect success.

A. proving         B.proved               C. was proved            D.has been proved

The cause he had devoted himself to _______ a perfect success.

A. proving             B. proved                     C. was proved        D. has been proved

The cause he had devoted himself to _______ a perfect success.

A. proving             B. proved                     C. was proved        D. has been proved

 The cause he had devoted himself ________ a perfect success.

A. to proved   B. proved   C. to prove   D. to proving

（2010·浙江余杭高级中学高三上第二次月考）      9. The cause he had devoted himself ________ a perfect success.

A. to proved   B. proved   C. to prove   D. to proving