—How can I get a present in the game show?
—You _________ one if you answer all the questions correctly.
| A．were given | B．have given |
| C．will be given | D．have been given |
— Do you believe that paper is made _______ wood?
—Yes, I do. And you can see that books are made________ paper.
| A．from; from | B．from; of |
| C．of; from | D．of; of |
______ is said that our math teacher often does volunteer work on weekends.
| A．One | B．This | C．It | D．That |
I took the wrong train _______. I didn’t even know it until half an hour later .
| A．by mistakes | B．by mistake |
| C．with mistake | D．with mistakes |
The mobile phone has influenced people’s life a lot since it ________.
| A．invents | B．invented |
| C．is invented | D．was invented |
--- I have trouble _______ my new computer.
---Don’t worry. I’ll show you how _______it.
| A．using; using | B．to use; to use |
| C．using; to use | D．to use; using |