Choose the best answer (根据文章内容，选择最恰当的答案)

Choose the best answer (根据文章内容，选择最恰当的答案)
Traditionally, the President is the highest-pad public employee. A salary of $ 400,000, along with other benefits, is paid to the President annually. But President Obama’s income for 2008 was far more than that, according to the White House.
The White House recently published the tax returns (纳税申报单)of Obama and Vice –president Joe Biden. Tax returns are reports of tax that a person has to pay. They often include income information used to calculate the tax. In the US, people whose incomes are over a certain amount have to file tax returns(纳税申报)every year. The tax returns of government officials are open to the public. This transparency helps to prevent corruption(腐败)。
From Obama’s tax returns , we can see that the President and first lady President’s two books Dreams From My Father and The Audacity of Hope(《无畏的梦想》). The two books, published in 1995 and 2006,are very popular and have been on the bestseller(畅销书)list for a long time.
The Obama’s income is down from 2007,when they made ＄4.2 million. However, that is still far more than former US President George Bush earned, who reported a total of ＄719,274 for his final year. The Obamas’ income also greatly exceeded(超出)that of Biden, who reported a family income of ＄2269,256.That’s about a tenth of what the Obamas earned. As Vice-president, Biden earns a salary of ＄220,000.US families earn an average income of about ＄50,000.
The Obama’s tax returns also show that together, the President and his wife paid about ＄933,000 in taxes. They gave $172,050 —nearly 6.5 percent of their earnings —to different charity groups. In the US, if a person gives his money to churches and non-profit(非盈利)organizations, the law reduces his or her taxes. This is one reason why rich people in the US like to give money to charity.

小题1:_______had the highest income in 2008.

A．Obama

B．Biden

C．Bush

D．George

小题2:How much did Obama and his wife earn in 2008?

A．$400,000

B．$2,660,000

C．$4,200,000

D．$719,274

小题3:In the US, which people have to file tax returns?

A．Everybody

B．Wealthy people

C．Government officials

D．People whose incomes are over a certain amount.

小题4:The Obamas have given_______ percent of their earnings to charity.

A．10

B．6.5

C．9.7

D．4.3

小题5:Why should the tax returns of government officials be open to the public?.

A．Because it can help to prevent corruption

B．Because it can make government officials well-known to the public.

C．Because it can help government officials to get more money.

D．Because the government wants them to pay more taxes to the public.

小题6:According to the law, if a rich man gives his money to charity,_______.

A．he will be praised by the people

B．he will pay fewer taxes

C．he will be free of taxes

D．he will get some extra money from the government.