This is ________ each year a great number of people from all over the world try to immigrate to California．

1. A.
   when
2. B.
   what
3. C.
   why
4. D.
   that

---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.

 ---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

---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.

---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.

1. A.
   how; immigrate
2. B.
   Why; immigrate
3. C.
   because; remove
4. D.
   why; remove

―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

---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.

--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