问题：
He _____ go now. He _____ clean the classroom first.
[ ]
A. needn’t; need
B. can’t; has
C. can’t; have to
D. can’t; has to
He _____ go now. He _____ clean the classroom first.
B. can’t; has
C. can’t; have to
D. can’t; has to
[ ]
A. needn’t; need B. can’t; has
C. can’t; have to
D. can’t; has to
参考答案：