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7.Developing countries should adopt labour-intensive technologies to ____ their comparative advantage of abundant labour. A.use B.exploit C.employ D.explore 8.The sudden demise of Britains oldest investment bank ____ global markets. A.vibrated B.swung C.trembled D.jolted 9.The tests show the earlier in life a person hears a sound the longer it is ____. A.retained B.preserved C.remained D.reserved 10.The researchers test college students ____ to foreign speech before their second birthday but not since. A.disclosed B.exposed C.exhibited D.revealed 11.The government has provided the capital library with heavy ____ to keep it one of the largest in the world. A.subscriptions B.tips C.subsidies D.bonuses 12.The doctor took his temperature,it was two degrees above ____. A.ordinary B.average C.regular D.normal 答案：B D A B C D 7. exploit开发，利用 explore调查，研究 8. vibrated使振动 swung摆动，转变 trembled发抖，担忧 jolted使慌乱，震惊 9. retained保留，保持 preserved保护，保存 remained剩下，仍是 reserved储备，预定 10. disclosed泄露，揭发 revealed展现，揭示 11.subscription署名，订购，捐助 subsidies特殊津贴，财政援助 bonuses奖金，红利 | 
