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After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听到问题后,必须从A、B、C、D四个选项中选出最佳选项。
youdao
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After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听到问题后,必须从A、B、C、D四个选项中选出最佳选项。
youdao