Ⅲ.用所给词的适当形式填空
【小题1】The children tried ______ (go) to school by themselves.
【小题2】Lingling’s father went to Beijing on business a few days ______ (early).
【小题3】I ______ (read) a novel last night when I heard the knocks at the door.
【小题4】Soon his leg began ______ (hurt) after Tom had an accident.
【小题5】Mr Bethune hurried ______ (operate) on the injured soldiers though he had already worked for a long time.