Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.

Question: Could you tell me some suitable idioms to express this situation: A guy told you a joke, but it's not funny at all. In Japanese, we say "He slipped" or "His joke was so cold that the air got frozen," for that situation. Are there any similar phrases in English? 
Answer: Sarcastically I am smiling, but my heart's crying inside. 2.you have nailed the coffin of laughter with a golden nail. oh God, please Kill Me . Hang Yourself , would be the one chooses often too Would be the real expression for an unfunny joke.
no

Question: I recently had somebody tell me that a mutual friend of ours who is genderqueer prefers that people refer to him/her using the gender-indefinite pronoun they. In some cases, this almost seems okay: Kris left their umbrella at our house. On the other hand, if Kris is sitting right next to you, it feels very odd to say They (meaning just Kris) would like more cake. Or even odder, Kris would like some more cake, can you please pass it to they/them?" Are these usages grammatically correct? Are they in the process of becoming grammatically correct? Are there more correct alternatives? 
Answer: My main gripe is the gratuitous change of number that sometimes happens when someone is trying to avoid gender-specific pronouns. Example: [old way] "Everybody has at least three dollars in his wallet." Formerly, when the gender of the antecedent was not specified the pronoun was forced to masculine. [misguided attempt at gender neutrality] "Everybody has at least three dollars in their wallet." Everybody is singular in number, which is why we do not say, "Everybody are going to the movies." [how I would do it] "Everybody has at least three dollars in its wallet." Gender is forced to neuter using an already-existing pronoun, and singular number is preserved. The following may prove useful to the OP.
no

Question: Do the English have an ancient (obsolete) verb for the action of the book opening? For example, in Russian we say otkrit' (open the book), but in the Old slavonic the verb razognuti (to unbend the book) was used. 
Answer: This is a very interesting question. There may not be an old word in English that does what you describe, but it is important to note that the English word "open" relative to a book meant something different in earlier times. To open a book now usually means to part or spread the cover and the pages into a position so you can read the pages contained in the book. However, books used to be made by folding sheets of paper larger than the page size and they would be sold without trimming the edges, so when you got your new book, it would be "unopened" meaning that you couldn't turn the pages. You had to "open" the book with a dull knife (like a letter opener) by ripping along the folds. (This is why some books have ragged edges of the text block, to evoke the memory of those ripped page edges.) The OED has e. transitive. To cut open the leaves of (a book) when they have been left joined along an edge during the making; to cut open (the leaves) of such a book. You will find old books described (by knowledgable book dealers) as "unopened". This correctly means that the folded sheets are un-ripped; it doesn't mean that no-one has ever spread the covers and looked inside.

yes