Definition: a reason to feel something or to behave in a particular way Level: C2
受到不公平待遇后，她完全有理由生气。
She has good ___cause to be angry after the unfair treatment.
气候变化是全球科学家担忧的一个重要原因。
Climate change is a significant ___cause for worry among scientists worldwide.
市场的突然崩溃让投资者有充分理由对经济感到担忧。
The sudden market crash gave investors ample ___cause for concern about the economy.
