Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
The preparation_________ by the time the guest_________
A. have finished- arrived
B. had been finished- arrived
C. had finished-were arriving
D. have been finished- were arrived
B
By the time + S + V( quá khứ đơn) + ..., S + V ( quá khứ hoàn thành) + ...
=> Đáp án B
Tạm dịch: Việc chuẩn bị đã hoàn tất khi khách đến