注意：此页面搜索的是所有试题
题目内容
（上海开放大学-大学英语2）
I have no idea who stole his wallet. It ________ anyone.
A)
could have been
B)
should have been
C)
must have been
A)
could have been
B)
should have been
C)
must have been
参考答案
