单项选择题


Street food is food that is prepared, sold and eaten on city streets. Street food is an important part of the (1) of people in developing countries. An (2) 2,500 million people worldwide eat street food. This kind of food is (3) in cost, tasty, nutritious and easy to serve, it is designed for the lives of busy people in large cities.
But buyers must be careful (4) health risks. Street food sellers in developing countries often (5) the storage, cooking and cooling equipment necessary to (6) the formation of dangerous bacteria. (7) some conditions, a single bacterium can grow into seventeen-million disease-carrying organisms in just eight hours. The lack of clean (8) water and waste removal systems also (9) the risk of infection.
The Food and Agriculture Organization is leading an effort to make street food (10) . (11) the past fifteen years, it has helped officials (12) street food in more than twenty cities worldwide. (13) , FAO officials have been working (14) the South African government (15) such a project. The UN agency produced a food safety teaching (16) for public health officials. The guide offers suggestions (17) how to prepare food (18) . A videotape shows (19) producing safe food results in (20) business.

A.low
B.high
C.good
D.poor