If you’re in an area with poor air quality levels, or if an infectious illness has been going around

If you’re in an area with poor air quality levels, or if an infectious illness has been going around, wearing an N95 face mask is a great way to protect your lungs and overall health.
Why to choose N95 face mask
N95 face masks are a great choice for protecting your lungs from dry particles（颗粒） in the air, which could include dust, or biological viruses. You can wear one when there’s been a flu outbreak in your area, or if pollutants or a fire has made air quality poor. These masks are made of structured, lightweight foam and fit over your nose and mouth.
How to choose N95 face mask
Depending on the particular N95 mask you choose, available sizes range from extra small and small to medium and large. If possible, try on a couple of sizes before you purchase one. Make sure the mask feels right and doesn’t slip on your face.
Store your masks correctly
Face masks tend to have large market in demand and sell out fast during certain times, such as during an outbreak of an infectious illness or when a region experiences intense pollution. Be always prepared by having some on hand for you and each of your family members. You can click the link below to purchase some. It’s necessary for you to have 2-3 masks per family member.
1. Which item can’t be prevented by N95 mask？
A. flu viruses B. damp air particles
C. dust particles D. fire smoke
2. When you prepare to buy masks, you need to______ .
A. choose right-sized masks for yourself
B. make masks move fluently on face
C. choose same-sized masks for families