Giải thích vì sao chọn đáp án đó giùm em với ạ!! Giải thích vì sao chọn đáp án đó giùm em với ạ!! Giải thích vì sao chọn đáp án đó giùm em với ạ!! 31. The principal will declare the ceremony open as soon as all the graduates and guests__________ . A. will have sat B. have been seated C. will be sitting D. have seated 32. The mini dress was___________ , but now it is making a comeback. A. was once a fad thought to be finished B. was once thought to be a finished fad C. was a fad once thought to be finished D. was a fad thought to be once finished