3 sentences

1. 他满怀信心地回答。

   tā mǎn​huái​xìn​xīn de huí​dá.

   He replied with full confidence.

   Source: CCMatrix

2. 我满怀信心地递交了申请。

   wǒ mǎn​huái​xìn​xīn de dì​jiāo le shēn​qǐng.

   I submitted my application with confidence.

   Source: CCMatrix

3. 逻辑学是一种系统性的方法，用于满怀信心地得出错误的结论。

   luó​ji​xué shì yī​zhǒng xì​tǒng​xìng de fāng​fǎ, yòng​yú mǎn​huái​xìn​xīn de dé chū cuò​wù de jié​lùn.

   Logic is a systematic method of coming to the wrong conclusion with confidence.

   Source: CCMatrix