“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
A. must be B. must have been
C. might be D. can have been
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
A. must be B. must have been
C. might be D. can have been
B
对过去情况的肯定推测，宜用“情态动词 + 动词完成式”，再根据句意，可确定答案为B。注：can 表示推测通常不用于肯定句。