It is generally believed that Watson and Crick’s discovery about DNA was ____ beginning of _____ enormous advances in _____ field of genetics.
| A．the, the, the | B．/, /, the |
| C．the, /, the | D．the, the, a |
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It is generally believed that Watson and Crick’s discovery about DNA was ____ beginning of _____ enormous advances in _____ field of genetics.
| A．the, the, the | B．/, /, the |
| C．the, /, the | D．the, the, a |
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