题目内容

49. ___

A. They are more likely to damage the cave.
B. It’s hard for them to stay awake.
C. They tend to break their equipment.
D. They may imagine seeing things that aren’t really there.

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50. ___

A. They are newer than the formations in most caves.
B. They were formed by sulfuric acid.
C. They have been artificially preserved.
D. They are smaller than those in any other cave.

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40. ___

A. Competition in business.
B. Government grants.
C. A type of economic policy.
D. International transportation practices.

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41. ___

American industrialists.
B. French economists.
C. International leaders.
D. Civil War veterans.

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42. ___

A. The rights of private business owners should be protected.
B. The government shouldn't interfere in private business.
C. Politicians should support industrial growth.
D. Competition among companies should be restricted.

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49. ___

A. They are more likely to damage the cave. B. It’s hard for them to stay awake. C. They tend to break their equipment. D. They may imagine seeing things that aren’t really there.

50. ___

40. ___

41. ___

42. ___

A. They are more likely to damage the cave.
B. It’s hard for them to stay awake.
C. They tend to break their equipment.
D. They may imagine seeing things that aren’t really there.