( )1.you're driving too fast. have you noticed that there is a speed________of 40 miles per hour along this road? a.range b.border c.enquiry d.limit ( )2.he makes it a________to put some money aside each month. a.discipline b.principal c.principle d.essential ( )3.—let's try operating the machine right now. —wait. better read the ________ first. a.instructions b.explanations c.information d.introduction ( )4.small businesses are finding it hard to survive in the present economic________. a.atmosphere b.world c.climate d.condition ( )5.those who suffer from heart trouble will find they get ________ from this medicine. a.defense b.safety c.shelter d.relief ( )6.though mark wasn't well educated, his common________guided him through a life. a.sense b.ground c.place d.practice ( )7.obama's success in presidential election proves that the color of one's skin shouldn't b