1.-----Nacy __________the letter from her mother.

1.-----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
2.She ______the film.she knows nothing about it.
A.can't see
B.can't have seen
C.must see
D.mustn't have seen