英语：请帮忙区别下列词组^O^Suddenly,he heard someone ( ) at the door.是填knock还是knocking

分类: 作业答案 • 2022-02-15 16:20:58

问题描述：

英语：请帮忙区别下列词组^O^
Suddenly,he heard someone ( ) at the door.是填knock还是knocking

答

knocking
hear sb doing sth 听见某人正在做某事
突然她听见有人敲门