By the time he at the party, all the other guests playing games.A．arrived; had begunB．arri

题目简介

By the time he ____ at the party, all the other guests ____ playing games.A．arrived; had begunB．arri

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

题型：单选题难度：中档来源：不详

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