1. Norovirus is caused by a very small virus and it is easily passed on from one person to another.

2. Because Norovirus is highly contagious, you risk passing on from other people who have been already in weak state.

3. Some people think that top athletes who pass drug tests might be still cheating.

4. Scientists who worked for one of these companies found new drug and gave mice some of the same benefits... (đề bị mất chữ không làm tiếp được)

5. When shopping, try to buy a majority of your food at the fresh-food section and limit the amount of ... (đề bị mất chữ không làm tiếp được)

@Active Activity.

$\text{1. Norovirus is caused by a very small virus and it is easily passed on from one person to another.}$

$\text{2. Because Norovirus is highly contagious, you risk passing on from other people who have been already in weak state.}$

$\text{3. Some people think that top athletes who pass drug tests might be still cheating.}$

$#Nocopy.$