We use you to talk about people in general including the speaker and the hearer:

You can buy this book anywhere > This book is on sale everywhere.
You can’t park here > Parking is not allowed here.
They don’t let you smoke in here > No smoking here

We use they or them to talk about people in general:

They serve good food here.
Ask them for a cheaper ticket.

… especially about the government and the authorities:

They don’t let you smoke in here.
They are going to increase taxes.
They are building a new motorway.
They say it’s going to rain tomorrow.

Exercise

Comments

Hello Asmaa,
You can see the answers to the exercise by clicking on 'See Answers' at the bottom-right. Try looking at just the first answer, then click 'Reset' and try to do all of the others.
Ask again if you don't understand the answers.
Best wishes,
Adam
The LearnEnglish Team

Is it possible that there are more  possibilities to do some of those?

Teaching method of British Council is very good.I am really happy to do exercises.

Thank you Adam . and i will try again to get the correct answers . and thank you once again :) ^_^

i don't understand how to answer the question.

Hello!
You need to write in the boxes, so that the sentence beginning 'You' or 'They' has the same meaning as the sentence above it. Does that make sense?
Best wishes,
Adam
The LearnEnglish Team

Thank Adam. You are very handsome..hihi

wow, I'm interested in this grammar. Who want to improve English with me?

 Can anybody help me to answer the last question? I have no clues! )) 

Hi Adam,
Could you kindly let me know, where can I find the ''See Answers''? I only see Help, Instruction, Reset, Check Answers and Finish.
Thank you!

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