Both are correct. When you speak about sitting on a chair, it’s more about that the chair may have very delicate fabric or you might be worried about getting it dirty and you’re asking permission. Sitting in a chair implies more that you were going to be in a place for a while.

In this case honorarium means that they are honoring people who have died and are no longer present.

Everybody is a plural group so you need to use a plural pronoun. The only correct answer is the answer with they.

Amend is usually used with documents, for example you need to make changes to an existing document you can amend the document. Patch is used mostly for fixing holes so you can patch a pair of pants or patch a hole in a boat.

Garbage contains food and other materials that could smell. Rubbish in general is in organic material like raggs or old lumber, stuff like that.

Minutes. Generally the word recorded is used when talking about minutes.

Did you know every hanzi is made by somethings called radicals? In chinese we have a total of 215 radicals. We can guess the meaning of a hanzi by it's radicals. you can look at phones to know some important radicals