A legend is a caption, a title or brief explanation appended to an article, illustration, cartoon, or poster.
A key is an explanatory list of symbols used in a map, table, etc.
May is where you say like for instance I may clean my room. I am just saying there is a chance I might do it. and shall is justa saying I absolutly going to do it.
Ji-Li's aunt- humiliated by Red Guards because she refused to let children pick her mulberry leaves. Aunt Xi-Wen had to paste a da-zi-bao to her front door saying terrible things about her.
The answer would be because it uses a direct quotation from the author of the source used.