It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.
| A．symptom | B．similarity | C．sample | D．shadow |
More and more people choose to shop in a supermarket as it offers a great _____ of goods.
| A．combination | B．mixture | C．extension | D．variety |
Mr. Wang has been selected_________ chairman of the conference.
| A．a | B．an | C．the | D．/ |
Paper-making began in China and from here it ________ to North Africa and Europe.
| A．spread | B．grow | C．carried | D．developed |
He wrote this article ____this great communist fighter, Dr. Bethune.
| A．in honor for | B．in return for | C．to honor of | D．in memory of |
As a result of the heavy fog, the highway has been closed up until further _______ .
| A．news | B．information | C．notice | D．message |