In order to have _____ better understanding of the accident, the three witnesses were called for _____ second meeting．
| A．a; a | B．the; a | C．a; 不填 | D．不填; the |
----- I’m taking my driving test tomorrow.
----- _____!
| A．Cheers | B．Good luck | C．Come on | D．Congratulations |
Some insects_____ the colour of their surroundings (环境) to protect themselves.
| A．take up | B．take off | C．take on | D．take out |
_____ is known to everybody, the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |
We are invited to a party _________in our club next Friday.
| A．to be held | B．held | C．being held | D．holding |
It sounds like something is wrong with the car’s engine. ______ , we’d better take it to the garage immediately.
| A．Otherwise | B．If not | C．If possible | D．If so |