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.