there are

(a)  

many extra-curricular activities

(a)  

I love photography

(a)  

for two years

(a)  

I do it

(here - the "it" is masculine)

(a)  

on Tuesdays

(a)  

at lunchtime

(a)  

Sometimes

(a)  

we take part

(use the verb "participar")

(a)  

in exhibitions

(exhibition = exposición)

(a)  

Last term

(a)  

I won a prize

(a)  

Last year

(a)  

I did swimming too

(a)  

I'm going to give it up

("it" is feminine)

(a)  

because it's a bit dull

(use "monótono to mean dull but remember you're still referring to "natación" :)

(a)