(42~44) Most people don’t cry because they are worried aboutbeing laughed at. In fact, tears are very important in oureveryday lives. Here are some helpful things about them. 
 First, tears can protect our eyes. When dust gets into oureyes, it can be washed out by tears. Tears also help keep our4eyes from being dry. Second, tears help us take stress away.Studies show that people get stressed when they are angry orunhappy. So it is useful for us to get stress out of bodies bycrying. Besides, tears can be an expression of emotions. Forexample, a wife may start to cry when she is talking more andmore angrily with her husband. She can “tell” her husbandthat she is not happy with him this way.   Now you know that tears are good for you. So don’t feelbad to cry in the theater when you watch a sad movie nexttime. dust 灰塵 stress 壓力 emotion 情緒
42. What is the main idea of the reading?
(A) How good crying is.
(B) Where stress is from.
(C) How to cry like a baby.
(D) Why people’s eyes are dry.