5) ты играешь в шахматы сейчас 6) он сейчас рисует красивую картину.

5) Are you playing in chess? 6) He is drawing beautiful picture now

You now playing in chess. He now painting beautiful picture.

 1/The plant produces different models of cars every day.- Завод производит разные модели автомобилей каждый день
2/The young workers train at the factory how to use the new equipment now - Молодые рабочие тренируются на заводе, как использовать сейчас новое оборудование.
3/ This road was built last year.

b) Сельскохозяйственная техника поменяла жизнь и работу на нашей ферме.
changed- past simple
Механики уже показали студентам новую технику. 
have shown - present perfect
Несколько частей машины реконструируются механиком.
are being reconstructed -present continuous

I arrived in Paris on Friday night. I was very tired when I arrived at the hotel. I hate waiting for people who are late. What are you going to do at the weekend? I don't know. It depends on the weather, I'm sorry , but really don't agree with you. I asked for a chicken sandwich, but this is tune! Let's invite Debbie and Tim for the party. Who's going to pay for meal? I need to speak to Martin at the meeting don't much money on food. Are you going to write to him soon? Don't worry about the exam. It isn't very hard . She fell in love with a man she met on the Internet. You're not listening! What are you thinking of? What do you think about Shakira? I really like her, she's great!