他在医院进行了一系列检查，但没发现任何问题。

He's had a ___series of tests at the hospital but they can't find anything wrong.

去年她在华威大学举办了一系列关于当代英国作家的讲座。

She gave a ___series of lectures at Warwick University last year on contemporary British writers.

本报告的目的是就哪些课程和其他活动应被拍摄提出一系列建议。

The aim of this report is to make a ___series of suggestions on which lessons and other activities should be filmed.