Bod and Alice have been married ________.
that 20 years
since 20 years
when 20 years
for 20 years
Correct Answer: EASY
+ For + interval. Ex: I have learned English for six years.
+ Since + timeline. Ex: I have learned English since 2013.
⇒ Bod and Alice have been married for 20 years.
Bob and Alice have been married for 20 years.