The storage of classified (分類的) research at all 24 labs run by the US Department of Energy was shut down this week after officials decided that the security (安全) problems recently found at the Los Alamos National Laboratory in New Mexico might also exist elsewhere.

Several computer disks went missing at Los Alamos earlier this month, forcing Energy Secretary Spencer Abraham to stop all work at the lab until the problems are found out. As of 26 July, two missing disks had still not been found, and 15 employees had been suspended in connection with the disappearance.

Now all energy labs will stop doing classified research that involves(需要) removable storage devices --- such as computer disks ---  until all the devices are given explanation for and new procedures are in place for monitoring their handling by laboratory employees.

"While we have no evidence that the problems being investigated are present elsewhere, we have a responsibility to take all necessary action to prevent such problems, "Abraham said on 23 July.

The shut-down isn't quite as dramatic（驚人的）as it sounds, experts say. Only two labs will be seriously affected: Sandia National Laboratories in Albuquerque, New Mexico, and Lawrence Livermore National Laboratory in  California. Together with Los Alamos, these two labs conduct the most part of the country's nuclear weapon programmes. At Livermore, 876 employees will be suspended during the storage of some 12,000 items of classified removable material.

At other labs, far fewer people will be affected. "The impact (影響) should be the smallest," says Martha Krebs, former director of the energy department's science office.

Why was the storage of classified research at all 24 labs shut down?

A. Because the security problems might be present elsewhere.

B. Because the security problems existed elsewhere.

C. Because two missing computer disks had still not be found.

D. Because officials decided to stop doing such research.

How many labs conduct the country's nuclear weapon programmes according to the text?

A. About 24. B. Only 2. C. More than 2. D. Over 15.

The underlined word "suspended"in the second paragraph probably means "______”.

A. hung from above  B. stopped from holding a position C. doubted D. fired

It can be inferred from the text that _____.

A. the computer disks must have been stolen by terrorists

B. the people living in the United States have little security

C. the United States is a country whose security is very bad

D. the missing of the computer disks caused great fear among Americans

Don’t sit there _______ nothing.Come and help me with this table.?

A. do B. to do

C. doing D. and doing?

You were silly not _______ your car.?

A. to lock B. to have locked

C. locking D. having locked

—Why did you leave that position??

—I _______ a better position at IBM.?

A. offer B. offered?

C. am offered D. was offered?

I would not have minded the difficulty of the work if the pay had not been so poor. I _______ the lowest wage of that time—two dollars an hour.?

A. paid B. had paid

C. had been paid D. was paid?

Kathy _______ a lot of Spanish by playing with the native boys and girls.?

A. picked up B. took up?

C. made up D. turned up?

I work in a business _______ almost everyone is waiting for a great chance.?

A. how B. which?

C. where D. that?

—Is he content to accept our offered price?

—Yes. He cares more about the quality. Money is _______ to him.?

A. everything B. none

C. nothing D. something

—Who called me this morning when I was out?

—A man calling _______ Robert.

A. him    B. himself

C. his      D./

The dying old man opened his mouth as if_______something.

A. to say  B. saying  C. to have said D. was saying