1 . There is strong and comprehensive evidence ________ the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. (用适当的词填空)

2 . For example, some of them may become involved in tobacco or alcohol abuse, ________ can lead to physical and mental health problems. (用适当的词填空)

3 . We are here to learn about the life and customs of the aborigines ________ are native to Australia. (用适当的词填空)

4 . She heard him declare that he didn’t want to leave her the next day, and ________ he felt more than just desire to please her. (用适当的词填空)

5 . There are various reasons _________ people compose poetry.（用适当的词填空）

6 . I have many friends, ______ some are businessmen.

A．of them

B．from which

C．who of

D．of whom