题目内容：

    The place of exposure to the greatest amount of allergen（过敏原）for the longest time is in the bedroom. Up to 60% of the dust mites（螨虫）found in the home are actually living in your bed and you spend about one-third of your life in the bedroom! And, bedrooms are the easiest area to control as an allergen free zone. Your cleaning professional will first vacuum the mattress（垫子）, carpeting and furniture using a vacuum cleaner.

The mattress is then thoroughly cleaned on all surfaces using the Responsible Care cleaning agents and a special low moisture cleaning tool designed to leave the mattress as dry as possible. Following cleaning, Allergy Relief Treatment is applied to all mattress surfaces using a fine mist application. The mattress is then placed in a drying position and a special air mover used to speed the drying process, which, depending upon temperature and humidity, normally takes about an hour.

The same safe cleaning agents are used to clean the bedroom carpeting and if desired, any furniture or rugs. This is also followed by an application of Allergy Relief Treatment. Once again, a speed drying system is set up to dry the cleaned items as quickly as possible and bring the humidity down to normal levels. Baseboards and windowsills are cleaned as well. While the cleaning and treatment service is being performed it is highly recommended that the bedding and pillows be washed in hot water and that two cups of Allergy Relief Treatment be added to the washing cycle.

While servicing the bedroom is the highest priority（优先）, significant benefits may also result from cleaning and treating other areas where allergy sufferers spend lots of time. These areas include the furniture and carpeting in rooms where time is spent watching television, reading and so on. Also, carpeted areas that pets have access to should be cleaned and treated.

A test for the presence of dust mites in quantities requiring treatment is also available from our company. But we will only test dust mites and will not provide information on pet allergen.

1.Which place has the most dust mites in your room?

A.Bed. B.Carpet.

C.Furniture. D.Floor.

2.What is mainly talked about in paragraph 2?

A.The use of cleaning agents.

B.The surfaces of mattress.

C.Cleaning the mattress.

D.Drying the mattress.

3.What do we know about Allergy Relief Treatment mentioned in this passage?

A.It is a cure to allergy.

B.It is a tool to kill mites.

C.It is the name of a company.

D.It is a chemical to prevent allergy.

4.Where might this passage come from?

A.A magazine about furniture.

B.The website of a cleaning company.

C.The website of a hospital.

D.A newspaper on public health.