That is exactly the context and explanation that should appear in post #1. Similarly, you could/should put "This is taken from materials I have to teach my students. I'm afraid I don't know the author or the source". You need to put that kind of explanation in every thread.
Why has it taken until the start of page 2 of responses for you to tell us that this is your student's school work? You've been a member of the forum for ten years now - surely you've learnt that we need to know such information right at the start.
Based on your statement in the quote box, do we take it that you are an English teacher? If not, why are your students doing their school work in English? If you are an English teacher, why do you constantly need our help? Also, why does your member profile not say "English teacher"?
First of all, for the last ten years, I have found tons of threads which don't specify concrete sources as below, but you and Rover mentioned something about it like the above. I can cite numerous examples. So it's quite evident that it is definitely a racial discrimination or groundless harassment, so you are only targeting me and a few others for lacking this background source even though I tried my best to present to you. This is almost a legal issue that you can't ignore.
And what difference does it make whether I provide you with the background information or not when the answer is all the same? I used to get good answers before, but after Rover had become the manager, everything has changed.
I can't help but judge that this is either a racial discrimination or a silly action of a cantankerous old man.
Before I make a worse comment about your irrational actions to many members officially, don't even try to think about making any negative comment about my thread.
*Context-less questions
https://www.usingenglish.com/forum/threads/280945-Duck-face
https://www.usingenglish.com/forum/threads/280905-There-are-people-who
The reason why I need your help is because that even though I'm an English teacher, I lack natural speaking skills as native speakers. But in the Korean educational environment, Korean English teachers are needed to teach English grammar and reading in Korean, which can come across to students as more effectively than what native speaker teachers can provide. Of course, I can't teach speaking English to them.
The other reason is that I also specified my occupation as "English tutor" in my profile, but what native English teacher is to Korean English teacher is what professional "Go-Baduk" players are to amateur "Go-Baduk" players. The former is perfect enough to make their living, while the latter is able to teach, but still lack natural skills.
Please understand my situation and I hope we can go as well as we have done so far.