植物通过光合作用吸收二氧化碳并释放氧气等气体。

Plants absorb carbon dioxide and release ___gases like oxygen during photosynthesis.

历史书中提到，一战期间士兵们经常被毒气攻击。

History books mention that soldiers were often ___gassed during World War I.

我们得在出发前给车加满油。

We need to ___gas up the car before we leave.

他总是喜欢吹嘘自己过去的成就。

He keeps ___bragging about his past achievements.