题目内容：

Whenever Prince George steps out for an engagement,like on the royal tour of Canada,or poses for 1.(office) photographs,he only ever wears shorts,2.has long confused royal watchers.

According to William Hanson,3. expert in ceremony,there’s a very good reason for this—and it has nothing to do 4. fashion,but rather a royal tradition that 5..(date) back to the sixteenth century.A new born baby would 6..(dress) in a gown for their first year or two.Then he was “breeched(穿裤礼)” and wore articles of clothing like shorts.The usual custom is that a boy graduates to trousers around eight years old.

With time 7.. (change),middle class boys began to wear trousers but they were considered suburban(土气的) by the upper.Hanson explains,“8.. is a very English thing to dress a young boy in shorts.”The British upper are always keen to hold on to tradition,and this also 9..(silent) marks them out from “the rest”.However,as for William and Kate,the 10..(decide) to dress George in shorts is more likely down to tradition than a class issue.