Question

— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. w.w.w.k.s.5.u.c.o.m

— 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

Answer 1

A

解析:

考查情态动词用法。本题先考虑本句可能出现的语境，设想一下某人去电影院看电影，本可以免费进入，却买了票。 could表示“可以”。