---- It is time to go to bed, Betty.
--- -- , mummy.
| A．Good night | B．Goodbye | C．Ok | D．Good evening |
You _________lose your way if you walk alone in the mountains at night.
A. may B need C. should D. ought to
We didn’t start our discussion __________ everybody arrived.
| A．since | B．if | C．while | D．until |
Take the exam carefully, _______ you won’t get full marks.
| A．but | B．and | C．or | D．so |
We hope that with the help of the new skill, Liu Xiang can run ________than before.
| A．fast | B．faster | C．fastest | D．the fastest |
The students from Xinjiang enjoy staying in our school because everyone is ____ to them..
| A．friendly | B．gently | C．happily | D．politely |