1. Well there are several words that read わけ, but I think that in this context it means 訳. In turn, this わけ has several meanings, out of which I’d choose “situation”. As in “You think that the situation, in which it’s possible to remember such things doesn’t exist?”
2. Well, from what I’ve found out, I’d say that in this context it’s used to indicate a rhetorical question.
3. I’d translate this sentence as “You think it’s impossible to remember such things?”
[update]
1. I failed this one.
2. Also failed, but maybe not too much…
3. And again I’ve failed. I think I did manage to roughly get the intended meaning though.

• This reply was modified 8 years ago by  trunklayer.

Ok, as always: first – answers, then – check:
1. I’d translated it as “that’s why”.
2. I think it means “I shaked hands with my father”.
3. If I’m not mistaken, it means “Nice to meet you”. It’s used when introducing yourself.
4. I’d translate the whole sentence as “That’s why I shaked hands with my father. Nice to meet you, father”.
[update]
1. Failed, but not too much, I think.
2. Close enough, I think.
3. Seems fine.
4. Well, all in all, I’d say close enough.

• This reply was modified 8 years ago by  trunklayer.

1. I find them very useful.
2. Yes I do.
3. The ones I’ve read so far are quite balanced.
4. Well, it’s been quite a while since they’ve stopped… I understand that コウイチ先生 is an extremely busy person, and he’s been doing these mini lessons for free… So, I’m in no position to ask for any more of them, but if there were more – at least a lesson once a few months, or even once a year – I think that would be great.
5. Well, I can’t say I have any preferences regarding the content… I like the idea of using the content from sources like drama (like it’s done in the “Good Life” mini-lessons), anime and books though.
6. No, I post my answers right after reading the questions. After that I go to check the correct answers and then modify my post. If the lessons were ongoing then I would post my answers and then read the answers of the others while waiting for the correct answers then I would finally compare my answers to the correct ones.
7. Well, as I’ve already said when answering question 4, I think it would be very helpful if these lessons started again, even a lesson once a year would be good enough.

• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.

Ok, first I’m going to answer myself then check it and update the post.
1. I think it was clear weather that day. Very clear weather in fact.
2. 良い　means “good”, so 良く means “well”.
3. I’d say it means “clear day”. 晴れる means “to clear up”, so the “day that was cleared up” would be “clear day”.
4. I’d say it means “very clear day”. “The day that was well cleared up”. As with the forth question of the previous lesson, I’d say that without the contest both present and past tense translations are possible, but as we are talking in the context of “Good life”, this should be past tense.
So, I’d translate it as “It was a very clear day”.

Time to compare my answers with the correct ones.
[update]Well, I’d say the difference between my answers and the correct ones is within the acceptable limits.

• This reply was modified 8 years ago by  trunklayer.

Ok, first I’ll give my answers then look at the correct answers and update my post.
1. I think it means “very”.
2. 空気 I know from WaniKani – it’s “atmosphere”; 澄む I’ll learn at level 45, so I had to look it up at jisho.org; it’s “to clear”. 空気が澄んだ – “Atmosphere has cleared” – I’d translate it as “clear-skied” (not sure there is such an adjective in English, though), “bright”.
3. I’d translate this whole sentence as “Very bright March morning”.
4. I think it’s です/だ at the end of the sentence.
update
1. Got that one correctly.
2. I think I got it close enough.
3. As for using “bright” instead of “clear” – I think it’s close enough. But it seems, I confused the tenses. As the end of the phrase was omitted, I assumed it’s in present tense, yet the official translation is in the past tense. I’m going to look this thread more carefully and if I can’t find anything – ask a question.
4. Got that one correctly.
second update
It seems I’m not the only one who thinks that this sentence could be translated in present tense as well as in past tense. I’ll need to ask this question.

• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.

Ok, I’m going to first post the answers I came up with myself and then look at the correct answers and compare them.
1. I’d say, there is a good chance that the person in question is a man, because he is using 僕 to refer to himself
2. I think that the second 僕 is actually part of 「僕が生まれった日」.
3. I’d translate 「生まれた日」 as “day when was born”. If this translation is correct then 「僕が生まれった日」 should mean “The day when I was born”.
4. I’d translate the whole sentence as “I’m thinking of the day when I was born.” While the first meaning of 「覚える」 is “to memorize”, “I’m memorizing of the day when I was born.” wouldn’t make much sense, neither would “I’m picking up the day when I was born.”, nor “I’m feeling the day when I was born.”, so that leaves us with “I’m thinking of the day when I was born.”
Time to check the answers!
[update]
Well, my first answer seems close enough to me. More so for the second and the third ones.
The fourth answer… All right, here is where I’ve failed. I’ve totally forgot that 「覚える」 can also mean “to remember”… Oh well, now I’ve memorized this meaning and will remember it.

• This reply was modified 8 years ago by  trunklayer.
• This reply was modified 8 years ago by  trunklayer.