The backpack is_____ sale_____ only fifteen yuan.
| A．on; at | B．for; in |
| C．at; for | D．on; for |
Not only the students but also their teacher _______ about the four people.
| A．know | B．knowing | C．knows | D．to know |
---Have you found ________ in the grass, Millie? ---No, not yet.
| A．nothing unusual | B．unusual anything |
| C．anything unusual | D．unusual something |
---It’s time to sleep, Daniel.
---Oh, Mum, I won’t go to bed _____ I finish my homework.
| A．after | B．until | C．because | D．since |
I don’t understand ________.
| A．what does Christmas mean | B．what Christmas does mean |
| C．what mean Christmas does | D．what Christmas means |
________ can give our energy and is also the colour of envy.
| A．Red | B．Bule | C．Green | D．Black |