-Someone’s knocking at the door. Is it your mother?
-No, dad. It _____be mom. I saw mom ____in the bedroom just now.
A.must, sleep | B.may, sleeping |
C.needn’t, sleep | D.can’t , sleeping |
-Someone’s knocking at the door. Is it your mother?
-No, dad. It _____be mom. I saw mom ____in the bedroom just now.
A.must, sleep | B.may, sleeping |
C.needn’t, sleep | D.can’t , sleeping |