It has been two and a half years _________ we left our primary school.
| A．because | B．than | C．unless | D．Since |
The girl saves money ____________ help the poor in need of food .
| A．so that | B．in order that | C．in order to | D．in order |
Could you please speak a little ？ I can't follow you.
| A．quickly | B．more quickly | C． more slowly | D．slowly |
All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
| A．something useful | B．anything useful | C．useful something | D．useful nothing |
I don’t like bread. I won’t eat it_____________ I am much too hungry.
| A．if | B．when | C．because | D．unless |
---Dad, must we wait until the light becomes green?
---Yes,I’m afraid we.That’s the traffic rule.
| A．can | B．may | C．have to | D．need |