Tom was disappointed(失望的) that most of the guests ____ when he _

Tom was disappointed(失望的) that most of the guests ____ when he _____ at the party.
A、left, had arrived
B、had left, arrived
C、had left, had arrived
D、left, arrived
【正确答案】：B
【题目解析】：本题考查动词时态。句意：汤姆失望了，因为他到达晚会时，大部分客人已经走了。guests先“离开”，Tom后“到达”。