In order to know how heavy the elephant was, he wrote down the weight of each stone and then ____all the weights.
| A．packed up | B．added up | C．went through | D．set down |
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In order to know how heavy the elephant was, he wrote down the weight of each stone and then ____all the weights.
| A．packed up | B．added up | C．went through | D．set down |
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