1£®—Have you seen the headmaster today?

—No, he is said to_have_gone (go) to Yunnan on business.

2£®The reason why he was absent(absence) from his best friend's birthday party was that he had to look after his sick mother.

3£®I hope you can study hard and master as much knowledge as possible, otherwise you'll have to live a hard life as a consequence.

4£®Susan apologized(apology) to her teacher for coming to school late and Miss Lin forgave her.