题目内容
Fill in the blanks with the proper forms of the given verbs. 用所给动词的正确形式填空.
Listen! Someone ________ (sing) in the next room.
答案:is singing
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题目内容
Fill in the blanks with the proper forms of the given verbs. 用所给动词的正确形式填空.
Listen! Someone ________ (sing) in the next room.