Why do we bring our hands close to the mouth while shouting

Why do we bring our hands close to the mouth while shouting Why do we need to wash our hands freuently? Do not close the door to our heart.By loving others.We too w For those our close relatives,the only thing we can do is to 求助“Tell the students to stop shouting. We ______ our essays While we do our best to find the most appropriate Homestay f we clapped our hands while they were marching across the par We （were clapping )our hands while they were singing on the The work our bodiles do while we are awake goes on while we The best things in life are unseen.That's why we close our e The best things in life are unseen,thats why we close our ey We_____(clap)our hands while the guards____(march)across the