Electric vehicles need more time for development. Electric vehicles are a new industry. I don't think they're able to help nature right now.

"Have" would be correct to say because you are talking about two things. The "Empire" and "the slave trade". However, I'm not sure about your use of "passed on" in this sentence. I can't tell if it's correct based on what you've written here. Great work, keep it up!

I am waiting for her.

Good afternoon. Today, I got up at eight-thirty. I slept for a while (about seven hours). I feel like I haven't slept that much in a long time. I've been busy the past few days. I just felt exhausted after the big event last night. I thought I was not as tired as I thought I would be that day after the big event. But I guess I was tired. The big event was a music competition. I am an oboe player in a band. The oboe is a woodwind instrument. It is similar to the clarinet in appearance but has two overlapping reeds. I have played oboe for six years and I love it. The oboe has a beautiful, true sound.　 However, it is very difficult for me to play the oboe. The first time I heard it, it was so beautiful that I will never forget it. It made a big impression on me. I'm very happy that I started playing the oboe, but I still only make noise when I play. It's annoying to listen to. I want to continue to work hard so that I can make music that everyone can feel comfortable listening to.

In my opinion, it is safe to travel in my country because there are many policemen walking in the street. There are also many cameras in my country.

Great job! Here are my corrections: "People often ask and think about the relationship between wealth and happiness. At first glance, a rich person looks very happy. Whatever he wants is always fulfilled. Although, if we observe them carefully, they will often complain because money can't buy happiness. So what is the secret to a happy life?" "In plain view"- we would say "at first glance", meaning when you look at something for the first time without looking too carefully. "not everything they want can be fulfilled with the money they have"- we would simplify this thought by simply saying "money can't buy happiness". Good luck with your English language journey! Keep it up!

Great job! For a longer sentence, you could say, "People usually eat tacos for breakfast."

I corrected some grammar mistakes, but some things I changed because it felt more 'natural' to me. Great job writing a response to that question! "Although I am not sure, it seems like it would be the wrong decision. In the future, children need to learn how to live and work with both genders. Why shouldn't they start learning these communication skills early on? While some are sceptical whether a desegregated atmosphere is okay, I suppose it's good to learn how to talk with the opposite sex in childhood. Otherwise, they would feel shy or speak unnaturally when they have to work with the opposite gender at work. It would be a bit late to learn how to have a "normal conversation" with the opposite gender at that point."