Put in the missing prepositions:

This style of clothing is very popular ..... teenagers.
A dog is faithful ...... its master.
He`s very critical ...... my work.
You must be patient ...... him
She`s jealous ...... her friend`s success.
Fresh air is good ...... you.
Your face is familiar ...... me.
I am very mach obliged ...... you ...... your help.
If you compare my work ...... his, you ...... will see the difference.
You must concentrate ...... what you are doing.

This style of clothing is very popular AMONG teenagers. A dog is faithful TO its master. He`s very critical ABOUT my work. You must be patient WITH him She`s jealous TO her friend`s success. Fresh air is good FOR you. Your face is familiar TO me. I am very much obliged TO you FOR your help. If you compare my work TO his, you --- will see the difference. You must concentrate ON what you are doing.