I visited / Ricky's and Maria's house / twice but didn't / find the couple.

A)
I visited
B)
Ricky's and Maria's house
C)
twice but didn't
D)
find the couple.

Correct Answer :   Ricky's and Maria's house


If two nouns are closely related, an apostrophe is used with the tailing noun. So, replace the second part of the sentence with 'Ricky and Maria's house'.