单项选择题Special words used in technical discussion ______.[A] never last long [C] should be confined to scientific fields[B] are considered artificial language speech [D] may become part of common speech

单项选择题A．the chairman of Democratic National CommitteeB．the chairman of Republican National CommitteeC．the spokesman of Democratic National CommitteeD．the spokesman of Republican National Committee

单项选择题A．Keith comes to interrupt himB．Keith has made serious mistakesC．he may not have time fill lateD．he would have to work in a factory

单项选择题A．has risen considerably recentlyB．tins fallen considerably recentlyC．has been considerably low recentlyD．has been considerably high recently

单项选择题A．for him to condemn Bush administration for its bad policyB．for him to develop a right guideline forC．for him to help his wife recover from illnessD．for him to be prepared for running for president in 2008