听短文,回答问题
Fast food slows down New words:
deliverymen (送货员);
helmets (头盔);
reckless (鲁莽的);
anxious (焦急的);
incentive systems (激励制度);
vehicles (交通工具)
The first paragraph mainly tells us that many food deliverymen _____.
How many traffic accidents did food deliverymen in Shanghai cause in the first half of 2017?
If a food deliveryman _____, the companies will fine him.
][英语知识部分]What is the main idea of the last paragraph?