А, Проанализируйте предложения и определите, какое суще- ствительное заменяется союзом which/thаt или who (выполия
ющим функцию подлежащего в придаточном предложении):
глагол-сказуемое, стоящий после союза, имеет или не имеет
окончание «s» в зависимости от числа существительного, кото-
рое заменяется этим союзом.
Например:
The human body consists of cells which vary in size and
shape.
Our body is a machine that works day and night.
1. The skin, our largest organ, is a flexible protective shield that
maintains body moisture.
2. An organ system consists of two or more organs which perform
a specific task.
3. People who exercise regularly feel healthy.
4. People who exercise feel stronger than those who do not.
5. People who are physically active are less susceptible to the type
2 of diabetes.
6. Healthy joints contain an important fluid that lubricates and
nourishes them.
7. The human body has millions of cells that require nutrients and
energy.

My ideal school is very big, with rooms for relax, big canteen, and long breaks. In my school you shouldn't wear a special uniform. Lessons start at 9 a.m and finish at 2p.m.
After third lesson will long break in which you can go to canteen, relax, reading book or doing your homework.  In classes will laptops in which you can study, also in your class will about 10 students, because it won't be loudly , and you might understand you teacher.
 Моя идеальная школа большая, с комнатами для отдыха, большой столовой и большими переменами. В школе тебе не надо будет одевать школьную форму. Уроки будут начинаться в 9 утра и заканчиваться в 2 часа дня. После третьего урока будет большая перемена на которой ты сможешь пойти в столовую, отдохнуть, почитать книгу или сделать домашнее задание. В классах будут ноутбуки по которым ты сможешь учиться, и также в классах будут находиться около 10 учеников, поэтому не будет шумно и ты сможешь понять учителя.

I adore music and I think people couldn’t live without it. We hear music everywhere: on TV, in the streets, over the radio, in the parks, in the shops, in the cars. To my mind, it doesn't matter what type of music people prefer: classical, rock, pop, jazz, and chamber. Everyone is fond of music. People buy discs, listen to music on computer or in Internet, go to the concerts, and visit Concert Halls or Opera Theatres. Some people go to music schools, they learn to play different musical instruments, try to compose music and sing in the chorus.

Music is a harmonious combination of different sounds. They are long and short, strong and weak. I enjoy listening to music because it always reflects my emotions and mood. Sometimes I attend the concerts and music halls, where it’s possible to see popular singers and groups. I like watching different music programs on TV as I’m interested to know more about talented singers and groups I like.

I like listening to the songs by Russian popular singers. I attend their concerts with pleasure. My friends and I always buy tickets beforehand and take bouquets of flowers for our favourite pop singers.

Both modern and classical music are very popular. One of my friends is fond of classics. He often spends his leisure time listening to Wolfgang Mozart. The “Sixth symphony” and the “Fourth symphony” by Shostakovich strongly impress him.

If you’re in a bad temper, music always helps you to forget about problems. Listen to your favourite song or melody and your melancholy will disappear at once, and you’re in a good humour again. After a hardworking day I usually listen to slow, beautiful melody because it helps to forget about my tiredness and to relax.

ЗАГОЛОВОК: MUSIC IN OUR LIFE.