John still hasn’t come out. He everything for the trip now.
John still hasn’t come out. He ______ everything for the trip now.
A. must have been preparing
B. must be preparing
C. will be preparing
D. will have prepared
Đáp án B
John vẫn chưa ra ngoài. Chắc chắn anh ta đang chuẩn bị mọi thứ cho chuyến đi.