1.He got up early so that he could catch the first bus.
He got up early________ ________ ________catch the first bus.
2.The teacher set us such a difficult problem that none of us worked it out.
The teacher set us________ ________ ________problem that none of us worked it out.
3.He went to school without breakfast so that he would not be late for class again.
He went to school without breakfast________ ________ ________ ________be late for class again.