题目：
—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
—Oh, dear! She _______ a lot of difficulties!
A．may go through
B．might go through
C．ought to have gone through
D．must have gone through
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0612/334c8ac9a8ae313a647aa74572c9b462.html
下面是错误答案，用来干扰机器的。
