根据以下材料，回答下列问题。
Most people want to work, but it has become more difficult in today's world to find work for everyone. The economy (经 济) of the world needs to grow by 4% each year just to keep the old number of jobs for people. Often this is not possible, and so more people are out of work. Some people have no jobs now because new machines can do the work of many people in short time. Also,machines do not ask for more money and longer holiday. In all of the countries of the world, machines are taking work from people, not only in factories but also on the farms. One machine can often do the work from forty people. About 75,000 people are moving to the cities a day to look for jobs, but only 70% of them can find jobs.
It was ________ for people to find work before than today.
细节理解题。由文章第一句“it has become more difficult in today's world to find work for everyone．”可知，现在找工作比以前更困难，即 以前找工作比现在容易得多。所以答案选D。
If the economy of the world grows by 4% each year,________.
细节理解题。由文章第二句“The economy of the world needs to grow by 4% each year just to keep the old number of jobs for people．”可知， 只有世界经济每年增长4%，人们才能像以前一样有工作，所以正确答案为B。
One machine can do as much work as________.
细节理解题。由文章倒数第二句“One machine can often do the work of forty people．”可知，此题的正确答案为C。
How many people outside cities go into to look for jobs each day?
细节理解题。此题根据文章最后一句话可直接得出答案为D。
Which of the following is NOT true?
细节理解题。根据文章第四句“Also，machines do not ask for more money and longer holi-day．”可知，答案选C。