题目内容
--- How many students are there in the classroom?
--- ______．All of them are practicing _____ the new song in the music hall．
| A．Nobody; singing | B．None; singing |
| C．Twenty; to sing | D．No one; to sing |
B
略
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--- How many students are there in the classroom?
--- ______．All of them are practicing _____ the new song in the music hall．