______ from the space, the earth, with water _______ seventy percent of its surface, looks like a blue ball.
| A．Seen; covered | B．Seen; covering |
| C．Seeing; covering | D．Seeing; covered |
It is not who is right but what is rightis of importance.
| A．which | B．it | C．that | D．this |
—Have you got any idea for the summer vacation?
—I don’t mind where we go______there’s sun, sea and beach.
| A．as long as | B．as if | C．now that | D．in order that |
_______is often the case with elder people, my grandma talked about my new hairstyle for at least 30 minutes.
| A．What | B．Which | C．As | D．It |
most parents care about is to provide the best education for their children.
| A．What | B．That | C．How | D．Whether |
--- May I smoke here?
--- If you , choose a seat in the smoking section.
| A．should | B．could | C．must | D．may |