3. perhaps my neighbours are at work now. my neighbours … be at work now. can may could might

Я думаю скорее всего may, потому что could и might - это формы, а здесь настоящие да еще и be

MUSIC:
Can you imagine a day without music?. I bet, you can't. There is music everywhere around us It is difficult to live without music. We can't live without music. I like to listen to the songs by our Russian popular singers. My friends and I buy tickets beforehand and often take flowers for our favourite singers.
SPORT:
Sport is very important to us. It is popular among young and old people. Many people do morning exercises, jog in the morning or train in different clubs.Other people like sports too but they only watch sports games and listen to sports news. But they don’t go in for sports. Among the sports popular in our country are football, basketball, swimming, volleyball, tennis, gymnastic. A person can choose sports and games for any season, for any taste.

Hello, Jane,

I haven't received any letter from you for two weeks. When I got your letter, it was very interesting for me to know what you had to stay.
So answering your questions.
I don't consider Easter to be a huge, gala holiday. I don't do anything special, we just buy an Easter cake, as do all people who celebrate Easter. How am I going to spend Easter holidays? Next Easter I am just going to have some fun walking in the forest very early in the morning. I enjoy my stroll when there is no people there. Isn't that cool?! It is!

Best regards,
Vsevolod.