—ThewomanbiologiststayedinAfricastudyingwildanimalsfor...

问题详情：

 —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

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题