Don’t touch the machine_________ the teacher allows you to.
| A．if | B．unless | C．since | D．that |
— We have known something about the accident, but we need more ____. Can you help us?
— Yes, sir.
| A．details | B．descriptions | C．instructions | D．spirits |
Our neighbours are so kind that they often give us a ____ when we are in trouble.
| A．head | B．heart | C．hand | D．foot |
The Sydney Opera House is like a huge sailing boat with water ____ three sides.
| A．at | B．of | C．in | D．on |
Beijing Opera is very and I am in it.
| A．interest; interest | B．interesting; interested |
| C．interested; interesting | D．interested; interested |
I don’t know what made you so.
| A．thinking | B．to think | C．think | D．thought |