2 sentences

1. 这种雕塑是用石膏做的。

   zhè zhǒng diāo​sù shì yòng shí​gāo zuò de.

   This sculpture is made of plaster.

   Source: Dong Chinese Dictionary

2. 他的腿摔断了，医生正忙着给他打石膏。

   tā de tuǐ shuāi​duàn le, yī​shēng zhèng máng zhe gěi tā dǎ shí​gāo.

   His leg is broken, and the doctor is busy putting it in a cast.

   Source: Dong Chinese Dictionary