Some Friday trivia!

1.The plane was arriving at eight. 2.A tram was just arriving at the hill foot. "was doing" means that you did sth for a while, not just for a moment in time. "arrive at" occurred at a moment in time. The length of time that someone did these actions decides the difference in tense used. Is it possible that the phrases “was arriving at”of two sentence above have been misused ？

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Are these expressions correct? My week is happy. My favorite food is sandwiches.

A：I haven't seen her in years and the first thing I do goes sideways. B: You're both difficult.I always thought that made it work. A: Until it didn't. B: Still. you need to help each other. 1. "Goes sideways" here means messed up or screwed up,right? 2. I can't get what does mean "Until" in "until it didn't" .

Can you please tell me if there are any changes to make? I'm going for a casual conversational style. Many thanks! • He stays silent in order not to be a distraction. • He kept the speech vague in order not to commit himself to one side or the other. • I wrote down her name so as not to forget it. • I came to see you not to complain, but to apologize. • The model was designed such that the value of x could be calculated. • The advertisement is printed in such a way that two very different pictures can be seen depending on how you look at it. • Our business is managed in such a way as to minimize its environmental impact

Do "cash" and "cache" sound the same?

Please help me learn English. How do I understand "couch potatoes" in the sentence? Some are very active, whereas others are couch potatoes. 一些人很积极，然而其他人懒惰颓废？