小题1:To the children who don’t even have shoes.
小题1: He realized there are children who don’t even have shoes.
小题1: More than 3,000 pairs of shoes.
小题1:Because he feels happy when he is doing it.
小题1: From Greg they learned that they should help others.
小题1:根据第一段But soon the shoes will have new owners, poor children in the USA and 20 other countries, 描述，可知答：To the children who don’t even have shoes.
小题1:根据第二段And I realized there are children who don’t even have shoes.描述，可知答： He realized there are children who don’t even have shoes.
小题1:根据第四段So far, S.O.S has collected and donated more than 3,000 pairs of shoes.描述，可知答： More than 3,000 pairs of shoes.
小题1:根据第四段And Greg has cleaned almost all of them. “People think of it as duty work,” he says, “but I like doing it, because I feel happy when I’m doing it.描述，可知答：Because he feels happy when he is doing it.
小题1:根据最后一段When they graduate, they say they will help others, just as Greg helped them.描述，可知答：From Greg they learned that they should help others.