wèn / tí / tài / duō / tā / yī / shí / mēng / tóu / zhuǎn / xiàng / bù / zhī / cóng / hé / shuō / qǐ

问题太多，他一时蒙头转向，不知从何说起。

There were too many issues; he was momentarily confused and didn't know where to begin.