30. It is the floor _________ by his wife every evening. which cleaned

30. It is the floor _________ by his wife every evening.

• A. which cleaned
• B. that cleaned
• C. that were cleaned
• D. that is cleaned

Câu chẻ bị động với danh từ chỉ vật

It + is/ was + Noun (chỉ vật) + that + be + V3/-ed…