---What attracts people to California is its pleasant climate and relaxed lifestyle.
---This is each year a great number of people from all over the world try to to California.
A. how; immigrate
B. Why; immigrate
C. because; remove
D. why; remove
网友回答
A. how; immigrate
(答案→)B. Why; immigrate
C. because; remove
D. why; remove
解析：考查表语从句和动词：句意：--吸引人们到加里福利亚的是它的怡人的气候和放松的生活方式。--这就是为什么每年有很多人从世界各地移民到加里福利亚的原因。用why连接表语从句，immigrate移民，remove消除，选B。