____ the help of experienced career instructors, this type of job-hunting training ____ to be very efficient.
| A．By; has proved | B．With; has proved |
| C．Under; is proving | D．With; is proved |
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____ the help of experienced career instructors, this type of job-hunting training ____ to be very efficient.
| A．By; has proved | B．With; has proved |
| C．Under; is proving | D．With; is proved |
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