37. I won't go if it___changing trains in London. A. cares B. indicates C. wants D. means ...

29. During his stay in Japan,he ___some Japanese habits. A. learned B. earned C. had D. picked up ...

4. I didn't want to get involved in argument,so I held___my tongue when asked about my opinion. A. on B. up C. in D. off ...

6. The farmers had the tractors____24 hours during the harvest season. A. working B. work C. worked D. Dto work ...

35: It is true that the US now has a "free market" system. A: 错误 B: 正确 ...

40: According to the US Constitution, Congress exercises the legislative power. It enjoys the power of making laws, levying taxes and appropriating money for government expenditure. A: 错误 B: 正确 ...

30: The continental USA runs 4505 kilometers from its Atlantic coast to Pacific coast，and 2574 kilometers from Canada to Mexico. A: 错误 B: 正确 ...

25: The first computer came into being in 1944and in the same year, the first atom bomb was tested. A: 错误 B: 正确 ...

17: The largest seaport of the United States is (). A: San Diego B: San Francisco C: Chicago D: New York ...

37: Before the breakout of the Civil War, the Whig Party, which had been formed during Jackson's day, began to break up. A: 错误 B: 正确 ...