问题:
—Where is Kangkang?
—He is ill. He _____ at home.
A. can be
B. may be
C. must be
D. be
—Where is Kangkang?
—He is ill. He _____ at home.
A. can be
B. may be
C. must be
D. be
—He is ill. He _____ at home.
A. can be
B. may be
C. must be
D. be
参考答案: