阅读理解阅读下面的文章，根据文章内容，完成相应的选择题。FOOD SAFETYA question that often tr

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阅读下面的文章，根据文章内容，完成相应的选择题。

FOOD SAFETY

A question that often troubles food companies is how to control problems like rats and insects without harming the food. Pest control experts say poisons should never be used where they may enter food. They say the first line of defense against pests is to clean the places where the food is handled or stored.

Floors, food preparation surfaces and tools can be disinfected with chemicals like chlorine, iodine or bromine. Food containers should be stored about half a meter off the ground and about half a meter away from any walls. Storage areas should be kept dry and clean.

Containers for raw materials such as rice, wheat, etc. should be kept closed and clean. Any foodstuff split during delivery or handling should be cleared up both inside and outside the building. Pests enter a building from the outside, so pay attention to outer walls. Small stones can be used to cover the ground and block the growth of plants and the grass should be kept short to deny pests a place to live.

Check that doors and windows are completely closed. Also any hole that might allow pests to enter a building should be filled. Rats can enter through a hole the size of a coin. A mouse can pass through a hole half that size.

Supervisors should make a list of pest control measures to be taken by employees. This will aid the efforts and also help prepare for any inspections. In most countries, there is a food and drug administration bureau, or some agency with a similar name, which enforces rules nationwide, responsible for rules about the use of pesticides, etc. However, businesses where food is stored, prepared or sold must also follow state and local health laws. Most of these governmental departments or bureaus have their websites with information about food safety policies and other issues. People can easily access the information.

操作提示：通过题干后的下拉框选择题目的正确答案。

1. According to pest control experts, why should poisons never be used in food companies？ {A; B; C}

A. Because they may enter food.

B. Because they may kill rats.

C. Because they may be harmful to the plants.

2. What is the first line of defense against pests？ {A; B; C}

A. To check that doors and windows are completely closed.

B. To clean the places where food is handled or stored.

C. To fill any hole that might allow pests to enter a building.

3. How can floors, food preparation surfaces and tools be disinfected？ {A; B; C}

A. With smoke.

B. With water.

C. With chemicals.

4. Why should attention be paid to outer walls？ {A; B; C}

A. To prevent pests from entering a building from outside.

B. To keep moist from entering a building from outside.

C. To stop sun rays from entering a building from outside.

5. What dose the passage mainly talk about？ {A; B; C}

A. Why poisons should never be used where they may enter food.

B. Why the growth of plants should be blocked and grass be kept short.

C. How to control rats and insects without harming the food.