1. are features that are added to something in order to make it look smarter.
答案Decorations
2.If you something,you make it go from your mouth down into your stomach.
答案swallow
3.An is the rectangular(矩形的) paper cover in which you put a letter and you send it to someone through the post.
答案envelope
4.You use “ ” to mean you are not joking and you really mean what you say.
答案seriously
5.A is a page or series of pages showing the days,weeks and months of a particular year.
答案calendar