A friend is a person who knows what you are saying ______ you are not talking.
| A．because | B．until | C．unless | D．even if |
—Are there any balls under the chair? —________.
| A．Yes, there is | B．Yes, they are | C．Yes, there are | D．No, there are |
There is an art room ___ the first floor.
| A．in | B．at | C．on | D．for |
There ________ some bread and eggs on the plate（盘子）.
| A．is | B．am | C．are | D．be |
There are four ________ students in our school.
| A．hundred | B．hundreds | C．hundreds of | D．hundred of |
There is a clock _______ the wall and windows are _____ the wall.
| A．on, in | B．in, on | C．in, in | D．on; on |