3 sentences

1. 没人相信他那个荒唐的说辞。

   méi rén xiāng​xìn tā nà gè huāng​táng de shuō​cí.

   No one believes his ridiculous excuse.

   Source: Dong Chinese Dictionary

2. 他为了掩盖真相虚构了一套说辞。

   tā wèi le yǎn​gài zhēn​xiàng xū​gòu le yī tào shuō​cí.

   He fabricated a story to cover up the truth.

   Source: Dong Chinese Dictionary

3. 他的说辞极具说服力，赢得了大家的支持。

   tā de shuō​cí jí jù shuō​fú​lì, yíng​dé le dà​jiā de zhī​chí.

   His argument was very persuasive and won everyone's support.

   Source: Dong Chinese Dictionary