He is really an excellent doctor and he is _____ to becoming an expert in this field.
| A．in a way | B．by the way |
| C．on the way | D．under the way |
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He is really an excellent doctor and he is _____ to becoming an expert in this field.
| A．in a way | B．by the way |
| C．on the way | D．under the way |
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