题目内容
【题目】---Listen! Who _____ in the classroom?
---It must be Alice, I think.
A. sing B. sings C. sang D. is singing
【答案】D
【解析】略
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题目内容
【题目】---Listen! Who _____ in the classroom?
---It must be Alice, I think.
A. sing B. sings C. sang D. is singing
【答案】D
【解析】略