My birthday is _____ December.
My birthday is in December.
She has studied English _____ five years.
She has studied English for five years.
He has worked at the company _____ last year.
He has worked at the company since last year.
I have been tired ______ yesterday.
I have been tired since yesterday.
I bought this phone a month _____.
I bought this phone a month ago.
We have been friends ______ ten years.
We have been friends for ten years.
We have been married ______ 15 years.
We have been married for 15 years.
I moved to this city _____ 2015.
I moved to this city in 2015.
I finished the book three hours ______.
I finished the book three hours ago.
She started her new job two weeks _____.
She started her new job two weeks ago.
She was born in _____.
She was born in 2005.
The train left ten minutes _____.
The train left ten minutes ago.
We have known each other _____ high school.
We have known each other since high school.