单项选择题 【C16】

单项选择题 【C15】

问答题 American workers have had no news this good for years. In June employers added 288,000 jobs, bringing the total for the year to 1. 4 million, the best six-month stretch since 2006. Unemployment has sunk to 6. 1%, the lowest rate in almost six years. It could hit levels long regarded as "full employment" within a year. Help-wanted signs are exploding, with vacancies up by 20% since January. Such a prosperous labour market is usually the token of a booming economy. Not now. In the first quarter gross domestic product fell by 2. 9% at an annual rate, the 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.