记者向政治家提出了一连串问题。

The journalist fired ___a ___string ___of questions at the politician.

该公司今年取得了一系列成功的产品发布。

The company has had ___a ___string ___of successful product launches this year.

快速城市化导致了一系列社会和环境问题。

The rapid urbanisation led to ___a ___string ___of social and environmental issues.