bạn tham khảo nhé
1.a
2.b
3.c
4.a
5.d

which disease called common?
=> It is the common cold
why do we call it the common cold?
=>because it very  year milions of people  catch it
what are the symptoms?
=>the symptoms are:a runny nose, a slight, fever, coughing and sneezing
how long will our cold last?
=>