These days, preventing ourselves from being infected(传染）by virus(病毒）MERS becomes a hot topic again. In order to avoid it, we should _________.
①develop good habits
② not touch or share anything with the patients who were infected
③ put everything that patients ever used into dustbins quickly
④ make sure the patient is really ill before sending him or her to the hospital
⑤ take exercise regularly to make our bodies strong
A．②③④
B．①②⑤
C．③④⑤