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1.In order to improve our standard of living，we have to accelerate production A)step up B)decrease C)stop D)control 2.Gas does accumulate in the mines around here. A)increase B)spread C)collect D)grow 3.Our plan is to allocate one member of staff to handle appointments. A)assign B)persuade C)ask D)order 4.Her behavior is extremely childish. A)simple B)immature C)beautiful D)foolish 5.We also want to use the water to irrigate barren desert land. A)hairless B)bare C)empty D)bald 答案： 1.A accelerate：加快o step up快。 Security is being stopped up to deal with the increase in violence.为了对付日益增长的暴力事件，安全工作正在加快。decrease ：降低。 Population growth。is decreasing by 1.4each year.人口正以每年1.4的速度下降。stop：停止。Her heart stopped three times.她的心脏三次停止跳动。control：控制。 The federal government tried to control rising health-care cost.联邦政府试图控制日益增长的医疗费用。 | 
