2 sentences

1. 演员在台上耍了很多噱头，逗得观众哈哈大笑。

   yǎn​yuán zài tái shàng shuǎ le hěn​duō xué​tóu, dòu de guān​zhòng hā​hā​dà​xiào.

   The actors used many gimmicks on stage, making the audience roar with laughter.

   Source: Dong Chinese Dictionary

2. 这种促销活动只是商家的噱头，并没有实质优惠。

   zhè zhǒng cù​xiāo huó​dòng zhǐ​shì shāng​jiā de xué​tóu, bìng méi​yǒu shí​zhì yōu​huì.

   This kind of promotion is just a marketing gimmick and offers no real discount.

   Source: Dong Chinese Dictionary