5 sentences

1. 我向国旗宣誓效忠。

   wǒ xiàng guó​qí xuān​shì xiào​zhōng.

   I pledge allegiance to the flag.

   Source: OpenSubtitles

2. 他宣誓向祖国效忠。

   tā xuān​shì xiàng zǔ​guó xiào​zhōng.

   He swore an oath of allegiance to his motherland.

   Source: Dong Chinese Dictionary

3. 我郑重宣誓，我一定会这么做。

   wǒ zhèng​zhòng xuān​shì, wǒ yī​dìng huì zhè​me zuò.

   I solemnly swear to do so.

   Source: OpenSubtitles

4. 请起立宣誓。

   qǐng qǐ​lì xuān​shì.

   Please rise to take the oath.

   Source: OpenSubtitles

5. 新任总统在就职典礼上庄严宣誓。

   xīn​rèn zǒng​tǒng zài jiù​zhí diǎn​lǐ shàng zhuāng​yán xuān​shì.

   The new president took a solemn oath at the inauguration ceremony.

   Source: Dong Chinese Dictionary