摘要：994] Tom was disapointed that most of the guests when he at the party. [译文] 汤姆很失望.大部分客人在他到来之前就离开了. A. left; had arrived B. let; arrived C. had left; had arrived D. had left; arrived [答案及简析] D. 此题是时态题.客人离开的动作发生在他到来之前.应该用过去完成时态.

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