这个有趣的谜题牢牢抓住了孩子们的注意力。

The interesting puzzle ___engages the children's attention completely.

他经常参与志愿者活动来帮助社区。

He regularly ___engages in volunteer work to help the community.

我们决定聘请一位专业摄影师来拍摄婚礼。

We decided to ___engage a professional photographer for the wedding.

我们的部队将在拂晓时分与敌军交战。

Our forces will ___engage the enemy at daybreak.

当你按下按钮时，这些齿轮会自动啮合。

When you press the button, these gears will automatically ___engage.