定期保养汽车可以延长它的使用寿命。

Regularly ___maintaining your car can extend its lifespan.

定期锻炼有助于保持身体健康。

Regular exercise helps in ___maintaining good health.

尽管大家都怀疑他，他仍坚持自己是无辜的。

Even though everyone doubted him, he kept ___maintaining that he was innocent.

他每月给父母寄钱以维持他们的生活开销。

He sends money to his parents every month for ___maintaining their living expenses.