17、_____ to their work, all the teachers of Senior III work day and night to help the students to pass the Entrance Examinations for colleges.

A. Devoting                            B. Having devoted

C. Devoted                             D. Being devoted

17、C

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_____ to their work, all the teachers of Senior III work day and night to help the students to pass the Entrance Examinations for colleges.

A. Devoting                            B. Having devoted

C. Devoted                             D. Being devoted

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