1.How often/ you/ study with a partner?-twice a week.

⇒ How often do you study with a partner? - I study with a partner twice a week.

2.How often/ Linda/ go to the cinema?-once a month.

⇒ How often does Linda go to the cinema? - She goes to the cinema once a month.

3.How often/ your mother/ go shopping?-every day.

⇒ How often does your mother go shopping? - My mother goes shopping every day.

4.How often/ you/ surf the Internet?-once a week.

⇒ How often do you surf the internet? - I surf the internet once a week.