The Science Of Sneezing
https://www.youtube.com/watch?v=EpGl6diL46o 0:15 hand-washing is important even they are coughing or sneezing into the crook of the arm. 肘(ひじ)の内側に向かって咳やくしゃみをしても、手洗いは大切です。
Cold and Flu Tip #12: Sneeze Etiquette
参考リンク
http://bridge-english.blogspot.com/2010/07/blog-post.html あの手この手を英語でなんと言うか?
練習問題解答
a-9298 into the crook of your arm with your elbow bent
b-4977 sneezing into the crook of your elbow