2 sentences for 弄清 (nòng​qīng — clarify)

1. 我们必须弄清事实真相。

   wǒ​men bì​xū nòng​qīng shì​shí zhēn​xiàng.

   We must clarify the truth of the matter.

   Source: Dong Chinese Dictionary

2. 在没有弄清情况之前，千万不要轻举妄动。

   zài méi​yǒu nòng​qīng qíng​kuàng zhī​qián, qiān​wàn bú​yào qīng​jǔ​wàng​dòng.

   Don't act rashly before you have a clear understanding of the situation.

   Source: Dong Chinese Dictionary