1 . He had a thick moustache and long white hair, _______ sometimes stood on end as though he had just received an electric shock. (用适当的词填空)

2 . He invited many people to his wedding, most of_________________ were absent for different reasons. （用适当的词填空）

3 . He was late for school again, ________ made the teacher very angry. （用适当的词填空）

4 . Later, the medicine was tested on malaria patients, most of_recovered. (用适当的词填空)