—Is Jack on duty today? —It __________ b
题型:选择题
问题:
—Is Jack on duty today?
—It __________ be him. It’s his turn tomorrow.
A.mustn’t
B.won’t
C.can’t
D.needn’t
—Is Jack on duty today?
—It __________ be him. It’s his turn tomorrow.
A.mustn’t
B.won’t
C.can’t
D.needn’t