contrived

他的道歉听起来很刻意，一点也不真诚。

His apology sounded ___contrived and lacked sincerity.

她精心策划了一个计谋来陷害她的同事。

She ___contrived a clever scheme to frame her coworker.

他巧妙地编造了一个故事来解释他迟到。

He ___contrived a clever story to explain his lateness.