You've gotten great answers for 1 and 4, but I want to add to the answers for 2 and 3: 2. "Deliberated" is definitely the best choice. Since you didn't ask about "attend" and "ceased," I think we can both agree that those are definitely wrong. "Reckon" is a word in British English, so I'm not super familiar with it. I know it means "think," but I'm pretty sure it means "think" in the sense of "believe." So, you could say, "I reckon I should go guy groceries," but you can't say, "I reckoned about whether to go buy groceries." (I hope someone from the UK will correct me if I'm wrong.) So, you can't "reckon" for a long time. For "consider," I think you could use "considered" here, but "deliberated" is the better option. "Deliberate" implies that the person is choosing between multiple specific choices. For example, when juries decide whether a person is guilty or not guilty, we say that the jury deliberates. Here, there are only so many moves that the player could make, and he is deciding which of the available options is best. So, he is deliberating. "Consider," on the other hand, just implies long and hard thought, or it can imply that the person is deciding whether or not they like a single option. So, using the grocery example from "reckon," you could say, "I considered buying groceries," but it would sound a little strange to say "I considered whether or not to go buy groceries." You could say it, but it would sound a little strange. 3. Both would work equally well here, but they have different implications. "Rarity" is more general. It just means that there won't be many people who can afford to speak only one language. A "curiosity" is a specific rarity - a rarity that would make someone look twice and say, "Huh. That's weird." So by picking "curiosity," the book is saying that, in the future, a person who can afford to speak only one language will seem strange and maybe even quaint to other people. I'm guessing that context would have made this more clear.

When your footsteps shuffle they kind of drag along the ground, when you shuffle cards you mix them up. I don't know why they're related, it could be just coincidence. To attend to something is to take care of it, to cease to stop, to reckon is like cowboy who is thinking about something, to consider is to think about a certain something, and to deliberate is to argue back and forth over certain options usually in a court room. I would say he considered an "x" for a long time. Since there's no 'x' that's being considered I would say He "deliberated" for a long time. I think this has something to do with transitive vs intransitive? A curiosity is an oddity. It's something strange and unusual. "Ripley's Believe it or Not" is full of things like this. A "rarity" specifically says there are not a lot of them. There's no reason why you couldn't say "Rarity" it's just that your book is trying to say it will be weird to only speak one language in the future. "He has never learnED good manners." He has never learned to properly behave himself. Some one who has bad manners is rude and inconsiderate. They don't act according the rules laid out for proper etiquette. When you have good manners you say "please" and "thankyou," or you open the door for others, and things like that. If you have bad manners you pick your nose in public, or you swear and cuss, or you just take what you want without asking permission, etc. I tried to clarify as much as I could, feel free to ask questions!

1) 'shuffle' refers to movement without much energy, interest, or specific intent or hurry. So one can shuffle down the street (moving without much energy or interest) and shuffling a deck of cards refers to moving them without a specific intent or trying to place them in any order (mixing them). 2) 'Deliberated' refers more to making a decision while taking future consequences of that decision into consideration. Like a court jury will deliberate over the evidence, realizing that what they decide could impact a person's life. Chess players usually take their matches VERY seriously :-) 'Considered' means thought was given to a choice, but not with as much worry or concern for the outcome. For instance, "Next week my parents and I will deliberate about what college I want to go to next year. But for now, I just have to consider what clothes I'm wearing out tonight." 3) 'A curiosity' and 'a rarity' do not mean the same thing, there is a difference. A curiosity could also be called 'an oddity', something noticeable that you may think about for a few moments but not worry about. A rarity is something unusual and uncommon, such as a rare animal. So in the future if many people speak more than one language and it becomes 'commonplace', it is not rare. As a native English speaker, my opinion is you could use either depending on your meaning. 4) It is an incomplete, incorrect phrase or one which has phrasing from a couple of centuries back, which you should not have to learn. It should be written as, 'He has never had to learn good manners' (either his manners are so impeccable that he knows them all, or he is a little monster whose parents/caregivers never taught them). Written as, 'He has never to learn good manners', is phrasing like you'd find in a Jane Austen movie, with the meaning that he doesn't have to learn good manners since he already possesses them in abundance.

1. I don't think there is a common image between the two. The word "shuffle" just has a few different meanings, 2 of which are: - to walk by dragging one's feet along or without lifting them fully from the ground. - to rearrange (a pack of cards) by sliding them over each other quickly. 2. Usually, when we use the verb "to consider" with the meaning of "to think carefully and often slowly, as about a choice to be made", we explicitly mention the thing being considered. For example, you may say "The man considered his next move for a long time before executing it". Using "considered" in the sentence you provided does not fit the sentence well because the thing being considered did not directly follow the word "considered". "Deliberate" fits much better. 3. Did you mean the textbook said the answer should be "rarity"? It fits better because curiosity has the meaning of "a strange or odd aspect" instead of "rarely exist". 4. "He has never to learn good manners." is a grammatically wrong sentence. It could be one of the following: "He has/had never learned good manners." "He will never learn good manners." "He never learned good manners."

I faileｄ to start new lines. Sorry for that again :-(