Please don't stand up in class until you ________.
| A．are told | B．will be told | C．are told to | D．will tell |
She prefers noodles ________beef and tomatoes.
| A．to | B．at | C．with | D．for |
I don’t like doing the cleaning, because it is ________.
| A．interesting | B．fun | C．boring | D．relaxing |
The boy spent 10 dollars ________ the model plane.
| A．on | B．with | C．at | D．for |
America is a ________ country.
A.develop B.development C.developing D,developed
We should keep our classroom _______.
| A．clean | B．cleaning | C．to clean | D．cleans |