1 . There is no point arguing about what ________ the accident. You’d better ________ the victims of it first.

A．led to; focus in	B．led to; focus on
C．caused; focused on	D．caused to; focused to

2 . Over the years, the system developed into different forms, as it was a time when people were divided geographically, ________ (lead) to many varieties of dialects and characters. (所给词的适当形式填空)

3 . As a British person, even today, my father still does not easily _____ eating things like chicken feet.

A．belong to

B．refer to

C．lead to

D．take to

4 . Teenagers’ physical changes may ________ (导致) such family tensions. （根据汉语提示完成句子）

5 . Over the years, the system developed into different forms, as it was a time when people were divided geographically leading to many varieties of dialects and characters. (英译汉)

7 . Experts warn that medical waste from hospitals, if not handled properly, may lead ________ spreading diseases. （用适当的词填空）

8 . Many of these chemicals can lead ________ cancer or other illnesses. (用适当的词填空)

9 . Too much work and too little rest often lead ________ various kinds of illnesses. （用适当的词填空）

10 . 人们意识到吸烟可能导致癌症。
It is recognized that ______ ______ ______ ______ ______.