tā / tīng / le / nà / jù / guài / huà / bàn / tiān / dōu / bù / zhī / dào / gāi / zěn / me / huí / dá

他听了那句怪话，半天都不知道该怎么回答。

After hearing that preposterous remark, he did not know how to respond for quite some time.