选择题：American workers have had no news tbis good for years.In June employers 8dded 28

American workers have had no news tbis good for years.In June employers 8dded 288,000 jobs,bringing the total for the year t0 1.4 million,the best six-month stretch since 2006.Unemployment has sunk t0 6.1%,the lowest rate in almost six years.It could hiL levels long regarded as"full employment"within a year.Help-wanted signs are exploding,with vacancies up by 20qo since January.Such a prosperous labour market is usually the token of a booming economy.NoL now.In the first quarter gross domestic product feU by 2.9%at an annual rate,Lhe worst showing since the recession.This was a result in part of bad weather.Yet the second quarter will only be strong enough to make up the ground lost in the first.Economists had thought 2014 would be the best year since the recession;with growth in the first half of around zero,it is shaping up to be the worst.