[单项选择]Tim collected some stamps,（）the 17th century.
A. dates from
B. that dated from
C. which was dated from
D. dating from

[填空题]The description of a language at some point in time is called diachronic study.

[单项选择]He has collected ______ as many stamps as I have.
A. three times more
B. more than three times
C. three time more
D. more than three time

[单项选择]
Scientists have known for some time that virtually all cases of cervical cancer are triggered by a family of viruses called human papillomavirus, or HPV. Most women who become infected with HPV are able to shake off the virus and suffer no apparent long-term consequences to their health. But a few women develop a persistent infection that can, for reasons that are not entirely clear, eventually lead to cancerous changes in the cervix.
Now researchers at the Digene Corp. of Beltsville, Maryland, have developed a test that detects an active HPV infection by looking for its genetic byproducts in the vagina. The HPV test was better than the standard Pap test at finding cervical cancer at any stage, according to two studies published this month in the Journal of the American Medical Association. So far, so good. Unfortunately, the test’s false-positive rate — how often it indicated that there was a problem when none existed
A. Right
B. Wrong
C. Not mentioned

[单项选择]A. He is going to buy some stamps. B. He is going to marl a letter.
C. He is going to pick up a package. D. He is going to see the postman.

[单项选择]What does the man want
[A] Some stamps.
[B] Sixteen new books.
[C] Thirty-two discs.

[单项选择]

The journey two naval (海军的) officers made some time ago to the very deepest point on the earth makes us realize how much of the world still remains to be explored. The two men went down seven mi les to the bottom of the Pacific Ocean inside a small steel ball called a "bathyscaphe" to find out if there are any signs of life.
It was necessary to set out early. So that the bathyscaphe would come to the surface in daylight and so be easily found by the mother ship which would be waiting for it. The drivers began preparations at dawn and soon afterwards, when all was ready, the steel ball disappeared under the surface of the water.
In time, the temperature dropped to freezing-point and the men trembled inside the ball. They kept in touch with the mother-ship by telephone describing how they felt. Then, at a depth of 3 000 feet, the telephone stopped working and they were quite cut off from the outside world. At 30 000 feet, the men were surprised by a sudden
A. so that they could return before dark
B. because the sea then was calm
C. because they wanted to return to the mother ship in twenty four hours
D. when the sun was not too strong