Tīng / dào / mén / wài / yǒu / shēng / yīn / tā / lì / kè / shù / qǐ / ěr / duo / zǐ / xì / tīng

听到门外有声音，他立刻竖起耳朵仔细听。

When he heard a sound outside the door, he immediately pricked up his ears and listened carefully.