Listen,the bird_____(singing,is singing)in the tree.选词填空

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/24 04:31:51
Listen,thebird_____(singing,issinging)inthetree.选词填空Listen,thebird_____(singing,issinging)inthetree.

Listen,the bird_____(singing,is singing)in the tree.选词填空
Listen,the bird_____(singing,is singing)in the tree.
选词填空

Listen,the bird_____(singing,is singing)in the tree.选词填空
is singing
be +doing 是进行时态的结构形式.