______earlier, I' d have told you.
| A．If I would have known it | B．Had I known it |
| C．If I knew it. | D．Should I know it |
I hesitate to get involved in this .
| A．advantage | B．adventure | C．advance | D．advice |
From space, the earth looks blue. This is about seventy-one percent of its surface is covered by water.
| A．why | B．how | C．because | D．whether |
struck me most in the movie was the father’s deep love for his son.
| A．That | B．It | C．What | D．Which |
The only way to succeed at the highest level is to have total belief ______ you are better than anyone else on the sports field.
| A．how | B．that | C．which | D．whether |
Police have found appears to be the lost ancient statue.
| A．which | B．where | C．how | D．what |