6. The Olympic Games _____ held every _____ years.
| A．is; four | B．are; four | C．is; five | D．are; five |
Isn't it very kind __________ your parents to do that for us?
A. for B to C. about D. of
I caught the last bus from town, but Harry came home___________ that night.
| A．very late | B．even later | C．the same late | D．the last one |
We will take________ wants to go there for a sight - seeing.
| A．whoever | B．who | C．anybody | D．all that |
—May I have another chocolate?
—Yes, of course.___________.
| A．Take it yourself | B．Eat it, please |
| C．Help yourself | D．Have it yourself |
Shortly after the accident, two___________ police were sent to the spot to keep order.
| A．dozens of | B．dozens | C．dozen of | D．dozen |