他随意用冰箱里的食材调配出了一道美味的沙拉。

He ___concocted a tasty salad with random ingredients from the fridge.

她编造了一个借口来解释为什么迟到。

She ___concocted an excuse to explain why she was late.

他精心编造了一个复杂的借口来解释他的迟到。

He ___concocted an elaborate excuse to explain his lateness.