--There is somebody knocking at the door. Who________ it be?
--I’m not sure. It ________ be a postman.
A.may; must | B.will; can |
C.can ; may | D.may ; will |
--There is somebody knocking at the door. Who________ it be?
--I’m not sure. It ________ be a postman.
A.may; must | B.will; can |
C.can ; may | D.may ; will |