You will fail the exam _____ you study harder than before.
| A．if | B．and | C．or | D．unless |
Peter’s teacher was very happy because he made the _____ mistakes in this exam.
| A．little | B．least | C．few | D．fewest |
Our classroom is on the _____ floor. We can hear the students singing on the fourth floor.
| A．fifth | B．five | C．three | D．Twelfth |
People like eating _____ very much. They are called “apples under the ground”.
| A．tomatoes | B．potatoes | C．pears | D．Bananas |
The Xisha Islands are _____ South China Sea. They belong to China.
| A．to | B．at | C．in | D．on |