adhere|adhered|adheres

驾驶员必须严格遵守交通规则。

Drivers must strictly ___adhere to traffic rules.

邮票牢牢地粘在了信封上。

The stamp ___adhered firmly to the envelope.

这家餐厅始终坚持使用有机食材。

The restaurant ___adheres to using organic ingredients.