By the time he at the party, all the other guests playing games.
A. arrived; had begun
B. arrived; began
C. had arrived; began
D. had arrived; have begun
网友回答
(答案→)A. arrived; had begun
B. arrived; began
C. had arrived; began
D. had arrived; have begun
解析：考查by的时态。By的用法是，by后面跟什么时态，主句就采用什么完成时，总之by是完成时的标志。 所以选择A