Jack ______ be in the library. He is pla
题型:选择题
问题:
Jack ______ be in the library. He is playing football on the playground.[ ]
A. can't
B. can
C. need
D. must not
Jack ______ be in the library. He is playing football on the playground.[ ]
A. can't
B. can
C. need
D. must not