1 sentence

1. 他原本想瞒着大家，结果一说话就露馅了。

   tā yuán​běn xiǎng mán zhe dà​jiā, jié​guǒ yī shuō​huà jiù lòu​xiàn le.

   He originally wanted to hide it from everyone, but he gave himself away as soon as he spoke.

   Source: Dong Chinese Dictionary