Definition: If you develop an illness or problem, or if it develops, you start to suffer from it. Level: B2
研究表明，每十二名女性中就有一人可能患上乳腺癌。
The study showed that one in twelve women is likely to ___develop breast cancer.
她最近养成了一些非常奇怪的习惯。
She's ___developed some very strange habits lately.
承受压力的动物经常出现焦虑症状。
The stressed animals often ___developed symptoms of anxiety.
