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

解析:

“must have done”結構，表示對過去發(fā)生情況的肯定推測。