Because of the economic slowdown, the government changed its policy to （ ）revenue by limiting commerce.

A.disregard B.challenge C.diminish D.reject

Directions: For this part, you are allowed 50 minutes to write a composition of no less than 300 words under the title of “Advantages and Disadvantages of Doing Research Online.” Your composition should be based on the following outline:

1) Present situation about doing research online;2) Advantages for online research;3) Disadvantages for online research.

The collapse of the Earth’s magnetic field — which guards the planet and guides many of its creatures — appears to have started seriously about 150 years ago, the New York Times reported last week.The field’s strength has decreased by 10 or 15 percent so far and this has increased the debate over whether it signals a reversal of the planet’s lines of magnetic force.During a reversal, the main field weakens, almost vanishes, and reappears with opposite polarity （极）.The transition would take thousands of years. Once completed, compass needles that had pointed north would point south. A reversal could cause problems for both man and animals. Astronauts and satellites would have difficulties. Birds, fish and animals that rely on the magnetic field for navigation would find migration confusing. But experts said the effects would not be a big disaster, despite claims of doom and vague evidence of links between past field reversals and species extinctions.Although a total transition may be hundreds or thousands of years away, the rapid decline in magnetic strength is already affecting satellites. Last month, the European Space Agency approved the world’s largest effort at tracking the field’s shifts. A group of new satellites, called Swarm, is to monitor the collapsing field with far greater precision. “ We want to get some idea of how this would evolve in the near future, just like people trying to predict the weather，” said Gauthier Hulot, a French geophysicist working on the satellite plan. “I’m personally quite convinced we should be able to work out the first predictions by the end of the mission. ’’No matter what the new findings, the public has no reason to panic. Even if a transition is coming on its way, it might take 2, 000 years to mature. The last one took place 780,000 years ago, when early humans were learning how to make stone tools. Deep inside the Earth flow hot currents of melted iron. This mechanical energy creates electromagnetism. This process is known as the geophysical generator. In a car’s generator, the same principle turns mechanical energy into electricity.No one knows precisely why the field periodically reverses. But scientists say the responsibility probably lies with changes in the disorderly flows of melted iron, which they see as similar to the gases that make up the clouds of Jupiter.1.According to the passage, the Earth’s magnetic field has（ ） .2.During the transition of the Earth’s magnetic field （ ）.3.The author says the public has no reason to panic” because（ ） .4.The cause of the transition of the Earth’s magnetic field comes from（ ） .

A.misguided many a man and animal B.begun to change in the opposite direction C.caused the changes on the polarities D.been weakening in strength for a long time
问题2：
A.the compass will become useless B.man and animals will be confused in directions C.the magnetic strength of the Earth will disappear D.the magnetic strength of the Earth will be stronger
问题3：
A.the transition is still thousands of years from now B.the transition can be precisely predicted by scientists C.the process of the transition will take a very long time to finish D.the new transition will come 780, 000 years from now
问题4：
A.the movement deep inside the Earth B.the periodical reverses of the Earth C.the force coining from outer space D.the mechanical movement of the Earth

I can respect someone who is（ ）for their actions, but I cannot respect someone who is always pointing the finger.

A.millennium B.dominant C.accountable D.commercial

The American dream is most （ ）during the periods of productivity and wealth generated by American capitalism.

A.plausible B.patriotic C.primitive D.partial

With the severe shortage of energy supply, we are facing the （ ） of a very hard winter.

A.expectation B.prospect C.promise D.damage