Tīngdào / zhège / xiāoxi / hòu / tā / yí / xiàzi / jiāng / zhù / le / bù / zhīdào / gāi / shuō / shénme.听到这个消息后,他一下子僵住了,不知道该说什么。After hearing the news, he froze and did not know what to say.