—Why weren’t you at the meeting?

—I ________ for a long-distance call from my aunt in America.

A．waited

B．was waiting

C．had been waiting

D．had waited

拓展训练强调学员在“做”中学习，它通常有（）等重要环节。

A.建立团队与团队热身

B.个人项目

C.团队项目

D.程序

E.回顾总结