我正在走回家,突然就下起了倾盆大雨。
I was walking home, and ___the ___next ___thing ___I ___knew, it started pouring rain.
她正在讲笑话,突然大家都狂笑不止。
She was telling a joke, and ___the ___next ___thing ___I ___knew, everyone was laughing hysterically.
我们正在平静地聊天,突然警报响了。
We were chatting peacefully, and ___the ___next ___thing ___I ___knew, an alarm went off.