1. The film Harry Potter was quite ______ hit across the world, bringing in ______ income of box office over millions of dollars within five months.
A. /; an B. a; / C. a; an D. a; the
2. ---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
