题目内容
用所给动词的适当形式填空:
--Listen! What ________ Bill________ (do)?
--He________(sing) in the next room.
答案:is;doing;is singing
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题目内容
用所给动词的适当形式填空:
--Listen! What ________ Bill________ (do)?
--He________(sing) in the next room.