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.