( )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
