As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work．
| A．不填；不填 | B．不填; a |
| C．the ; a | D．the; the |
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As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work．
| A．不填；不填 | B．不填; a |
| C．the ; a | D．the; the |
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