题目内容
根据句意从括号中选择正确的单词并填写在空白处。
Now, boys and girls, you _____ queue up before you go downstairs. (may, must)
答案：must
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题目内容
根据句意从括号中选择正确的单词并填写在空白处。
Now, boys and girls, you _____ queue up before you go downstairs. (may, must)