他用刀将西瓜劈成两半。

He used a knife to ___cleave the watermelon in two.

胶水干了以后，纸张紧紧粘在了一起。

After the glue dried, the papers ___clung together tightly.

尽管遭遇困难，她依然坚守自己的信仰。

Despite the hardships, she ___cleaved to her faith.