kàn dào / jǐng chá / cháo / jiā lǐ / zǒu lái / tā / xīn lǐ / zhuì zhuì bù ān / bù zhī dào / fā shēng / le / shén me / shì

看到警察朝家里走来，他心里惴惴不安，不知道发生了什么事。

Seeing the police walking toward his home, he felt anxious and had no idea what had happened.