My husband is a pilot, so he seems to be more prepared and careful than ordinarymost people. My husband is a pilot, so he seems to be more prepared and careful than most people.

My husband is a pilot, so he seems to beis typically more prepared and careful than ordinarymost people. My husband is a pilot, so he is typically more prepared and careful than most people.

Since you are talking about how your husband behaves on the regular, you want to use "typically" or "normally". "Seems to be" would be better suited if you were talking about someone you didn't know well: "The cashier I see at the market seems like a nice guy"

LThe first was last Thursday, when he met with colleagues working at other offices and had dinnerstayed late to have dinner with them, which iwas unusual. The first was last Thursday when he met with colleagues working at other offices and stayed late to have dinner with them, which was unusual.

At first glance, it's not entirely clear what is unusual about meeting with colleagues and having dinner. However, the phrase "stayed late to" provides a small, negative connotation, which helps the reader understand that something was wrong with this behavior.

And after sayinghe said goodbye to them, he missed the last train. And after he said goodbye to them, he missed the last train.

Since these actions both happened in the past, the sentence flows better if both clauses use the past tense.

He told me that anhe would triedy to walk home, whichbut that would have taken two hours. He told me that he would try to walk home, but that would have taken two hours.

"But" provides the feeling of consequence here, which will connect better to what you say in the next sentence.

I was worried about what might happen to him on his way home at night, so I asked him to take a taxi. I was worried about what might happen to him on his way home at night, so I asked him to take a taxi.

Solid sentence. You can also say "...about what COULD happen to him..." if you want to provide greater gravity to the possibility of something bad occurring.

The next day, I asked him how much he had paid for the taxi., The next day, I asked him how much he had paid for the taxi,

This sentence can be merged with the following.

He answereand he said that he had paid 5,000 yen. and he said that he had paid 5,000 yen.

Your use of "answered" is grammatically correct, but most English speakers would use "said".

YThe second mistake was yesterday afternoon, when he drove me to the library and, on our way, passed through a narrow path along a field. The second mistake was yesterday afternoon when he drove me to the library and, on our way, passed through a narrow path along a field.

The prepositional phrase "on our way" provides clarity that the passing through the narrow path occurred during the ride to the library. Your original sentence can be interpreted as happening afterwards.

ThenUnfortunately, the rear left side of the car was damaged. Unfortunately, the rear left side of the car was damaged.

The damage to the car happens at the same time as the crash, so "then" is not the best choice. "Unfortunately", however, does provide a nice sequence to the consequence of the crash.

This morning, he noticed that the prepaid museum tickets werehad already expired. This morning, he noticed that the prepaid museum tickets had already expired.

The third mistake was this morning, when he noticed that the prepaid museum tickets werehad already expired. The third mistake was this morning when he noticed that the prepaid museum tickets had already expired.

You want to use the past perfect tense "had expired" since the expiration had already happened before your husband noticed anything.