■ These machines are destroying our ability of thinking.
■ These machines are destroying our ability to think.
■ I want to improve my ability of reading.
■ I want to improve my reading ability.

■ I want to improve my ability of English.
■ I want to improve my ability in English.

뭐가 맞는 표현이에요???
여섯 개다 맞는 것 같은데...