Question

—— Nacy＿＿＿＿＿＿＿＿＿ the letter from her mother.
—— No, she can’t have. The postman hasn’t come yet.

A．can receive

B．can have received

C．must have received

D．must receive

Answer 1

C

“must have done”结构，表示对过去发生情况的肯定推测。