1.He is so young that he can't look after himself.

1.He is so young that he can't look after himself.
He isn't _______ ________ to look after himself.
He is _______ young ________ look after himself.
2.Tom carried on talking after the teacher came into the classroom.
Tom ________ ________talking after the teacher came into the classroom.
3.Dr Ma operated on the blind man last month.
Dr Ma________ __________ __________on the blind man last month.