---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 |
All the workers are working hard to create _____ we hope will be the best means of transport in the 21st century.
| A．what | B．where | C．which | D．that |
How I wish I _____ history when I was in university.
| A．study | B．studied | C．would study | D．had studied |
The student said there were a few points in the essay he _____ impossible to understand.
| A．had found | B．finds | C．has found | D．would find |
Mr. Smith, there is a man at _____front door who says he has _____important news for you.
A. the; anB. /; / C. the; /D /; an
The result is not very important to us, but if we do win, then so much _______.
| A．the best | B．best |
| C．better | D．the better |