HOUSE/ FRIEND/ STAYING/ TWO-FLOOR/ ONE//A. THE HOUSE WHERE MY FRIE...

26. House/ friend/ staying/ two-floor/ one//A. The house where my friend is staying in is a two-floor one.B. The house where my friend is staying in a two-floor one.C. The house which my frined is staying in is a two-floor one.D. The house which my friend is staying is a two-floor one.