Exercise 2. Choose the correct option:
a) My father have / has been to London.
b) My parents have / has been to New York.
c) I have / has studied English since I was 3 years old.
d) Marta have / has worked at Fontarron school for 5 yea
e) I haven't / hasn't visited my granparents since last mor
f) Coronavirus have / has killed many people.​