Our English teacher is often heard ____(sing) in her room.用所给动词的适当形式填空

问题描述:

Our English teacher is often heard ____(sing) in her room.
用所给动词的适当形式填空

你真会利用资源,singing

to sing一般现在时…被动式…

singing 被听到在她房里唱歌

singing