问题
选择题
Mr Wang often says to her child, "You _______ play with fire (火). It's dangerous.
[ ]
A. mustn't
B. had better
C. needn't
D. may not
答案
答案：A
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Mr Wang often says to her child, "You _______ play with fire (火). It's dangerous.
[ ]
A. mustn't
B. had better
C. needn't
D. may not
答案：A