Facing this ________ problem, I found myself ________ about how to work it out.
| A．puzzled; puzzled | B．puzzled; puzzling |
| C．puzzling; puzzling | D．puzzling; puzzled |
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Facing this ________ problem, I found myself ________ about how to work it out.
| A．puzzled; puzzled | B．puzzled; puzzling |
| C．puzzling; puzzling | D．puzzling; puzzled |
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