问题
选择题
—Where’s Jeff?
—I'm not sure. He __________ be playing football on the playground.[ ]
A. need
B. might
C. must
D. can
答案
答案：B
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—Where’s Jeff?
—I'm not sure. He __________ be playing football on the playground.[ ]
A. need
B. might
C. must
D. can
答案：B
