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6. It is said that the house along the street will be demolished. A. pulled down B. rebuilt C. renovated D. constructed 7. The staff of the company are always courteous and helpful. A. efficient B. respectable C. well-informed D. respectful 8.The construction of the railway is said to have been terminated. A. resumed B. ended C. suspended D. cancelled 9. It is postulated that population trends have an effect on economic fluctuations. A. challenged B. assumed C. accepted D. doubted 10.When Jack eventually overtook the last truck he pulled over to the inside lane. A. skipped B. passed C. reached D. led 答案：6.答案选A. demolish的基本词义为毁坏， 拆毁， 推翻。在句子中该词以被动语态的形式出现， 其宾语是句子的主语结构， 因此 demolish在句中的词义为拆毁， 因此A是答案。 7. 答案选D. Courteous词义单一， 其基本词义为有礼貌的， 因此D是答案。 | 
